 | George Albert Wentworth - 1893 - 376 pàgines
...: 3 : : 18 : 9, means, and is read, the ratio of 6 to 3 is equal to the ratio of 18 to 9. 253. Tine first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 254. Test of a proportion. When four numbers are proportionals,... | |
 | Wooster Woodruff Beman, David Eugene Smith - 1895 - 344 pàgines
...is also used in this connection as a sign of equality, the proportion being written a : b : : c : d. The first and last terms of a proportion are called the extremes, and the other terms the means. FUNDAMENTAL PROPERTIES. I. If a : b = c : d, then ad = bc. Proof. 1. From -... | |
 | Wooster Woodruff Beman, David Eugene Smith - 1895 - 346 pàgines
...is also used in this connection as a sign of equality, the proportion being written a : b : : c : d. The first and last terms of a proportion are called the extremes, and the other terms the means. FUNDAMENTAL PROPERTIES. I. If a : b = c : d, then ad = bc. Proof. 1. From r... | |
 | George Albert Wentworth - 1896 - 430 pàgines
...: 18 : 9, means, and is read, the ratio of 6 to 3 is equal to the ratio of 18 to 9. 253. The j?rs< and last terms of a proportion are called the extremes, and the two middle terms are called the means. 254. Test of a proportion. When four numbers are proportionals,... | |
 | George Albert Wentworth - 1898 - 424 pàgines
...means, and is read, the ratio of 5 to 3 is equal to the ratio of 15 to 9. 386. Means and Extremes. The first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 387. Test of a Proportion. When four num hers are in proportion,... | |
 | George Albert Wentworth - 1898 - 424 pàgines
...means, and is read, the ratio of 6 to 3 is equal to the ratio of 15 to 9. 386. Means and Extremes. The first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 387. Test of a Proportion. When four numbers are in proportion,... | |
 | George Albert Wentworth - 1898 - 424 pàgines
...means, and is read, the ratio of 5 to 3 is equal to the ratio of 15 to 9. 386. Means and Extremes. The first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 387. Test of a Proportion. When four numbers are in proportion,... | |
 | Wooster Woodruff Beman, David Eugene Smith - 1899 - 265 pàgines
...proportion being written a:b: :c:d. The double colon is not, however, as extensively used as formerly. 228. The first and last terms of a proportion are called the extremes, and the other terms the means. Thus in the proportion 2 : 3 = 6 : 9, 3 and 6 are the means and 2 and 9 are... | |
 | Wooster Woodruff Beman, David Eugene Smith - 1899 - 400 pàgines
...being written a: b : :c:d. The double colon is not, however, as extensively used as formerly. 228. The first and last terms of a proportion are called the extremes, and the other terms the means. Thus in the proportion 2 :3 = 6 :9, 3 and 6 are the means and 2 and 9 are the... | |
 | Frank Castle - 1899 - 424 pàgines
...The proportion is written as 6 : 8 : : 15 : 20, and this should be read as 6 is to 8 as 15 is to 20. The first and last terms of a proportion are called the extremes, and the second and third terms the means ; thus 6 and 20 are the extremes, and 8 and 15 are the means in the... | |
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The first and last terms of a proportion are called the extremes, and the two middle terms are called the means. 
