 | Adrien Marie Legendre - Geometry - 1838 - 372 pages
...When four quantities have this relation to each other, they are said to be in proportion. To indicate that the ratio of A to B is equal to the ratio of C to D, the quantities are usually written thus, A : B : : C : D, and read, A is to B as C is to D. The quantities... | |
 | Charles Davies - Algebra - 1839 - 272 pages
...relation to each other, they are said to be in proportion. Hence, proportion is an equality of ratios. To express that the ratio of A to B is equal to the...ratio of C to D, we write the quantities thus : A : B : : C : D; and read, A is to B as C to D. The quantities which are compared together are called the... | |
 | Algebra - 1839 - 368 pages
...relation to each other, they are said to be in proportion. IJence, proportion is an equality of ratios. To express that the ratio of A to B is equal to the...ratio of C to D, we write the quantities thus, A : B : : C : D. and read, A is to B, as C to D. The quantities which are compared together are called the... | |
 | Bourdon (M., Louis Pierre Marie) - Algebra - 1839 - 368 pages
...relation to each other, they are said to be in proportion. Hence, proportion is an equality of ratios. To express that the ratio of A to B is equal to the ratio of C to D, we write the quantities thus, A t B : : C : D. and read, A is to B, as C to D. The quantities which are compared together are called... | |
 | Charles Davies - Algebra - 1839 - 264 pages
...and D, having such values that BD then A is said to have the same ratio to B that C has to D ; or, the ratio of A to B is equal to the ratio of C to D. When four quantities have this relation to each other, they are said to be in proportion. Hence, proportion... | |
 | Charles Davies - Algebra - 1842 - 368 pages
...relation to each other, they are said to be in proportion. Hence, proportion is an equality of ratios. To express that the ratio of A to B is equal to the ratio of C to I), we write the quantities thus, A : B : : C : D. and read, A is to B, as C to D. The quantities which... | |
 | Charles Davies - Algebra - 1842 - 284 pages
...having such values that S. D A~ C' then A is said to have the same ratio to B that C has to D ; or, the ratio of A to B is equal to the ratio of C to D. When four quantities have this relation to each other, they are said to be in proportion. Hence, proportion... | |
 | James Bates Thomson - Geometry - 1844 - 268 pages
...8x2:4x2=2; And the ratio of 8n-2 : 4-^-2=2. 1 1 . PROPORTION is an equality of ratios. Thus, if th« ratio of A to B is equal to the ratio of C to D ; ie, if A_C B~D' the four magnitudes A, B, C, D, form a proportion. So the numbers, 1*2, 4, 6, 2,... | |
 | Charles Davies - Algebra - 1845 - 382 pages
...having such values that 2--RA ~ C' then A is said to have the same ratio to B, that C has to D', or, the ratio of A to B is equal to the ratio of C to D. When four quantities have this relation to each other, they are said to. be in proportion. Hence, proportion... | |
 | Nathan Scholfield - 1845 - 894 pages
...other, they are said to be in proportion. Proportion, then, is an equality of ratios. 9. To indicate that the ratio of A to B is equal to the ratio of O to D, the quantities are usually written thus, A : 1»: : C : D, and read. A is to B as C to D ;... | |
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To express that the ratio of A to B is equal to the ratio of C to D, we write the quantities thus : A : B : : C : D; and read, A is to B as C to D. 
