 | Mathematics - 1915 - 830 pages
...ratios is said to form a proportion, or in other words four quantities are said to be in proportion when the ratio of the first to the second is equal to the ratio of the third to the fourth. Thus 5 ft. $25 2 ft. $10 is a proportion. This is often written 5 ft. : 2 ft.... | |
 | George Hervey Hallett, Robert Franklin Anderson - Algebra - 1917 - 432 pages
...Find the numbers. Proportion 171. Definitions. Four numbers or quantities are said to be in proportion when the ratio of the first to the second is equal to the ratio of the third to the fourth. Remark. In what follows we shall use the expression, the ratio of one number to... | |
 | Harry Morton Keal - Mathematics - 1917 - 148 pages
...21° to the supplement of the same angle. Find the angle. 20. Find three consecutive numbers such that the ratio of the first to the second is equal to the ratio of 5 times the third to 5 times the first plus 16. Variation 101 Direct Proportion: If a train travels... | |
 | Harry Morton Keal, Nancy Seymour Phelps - Mathematics - 1917 - 240 pages
...x-2 5x-7 l0x+11 12. 3x-5 6x+ 7 3x DIRECT VARIATION 91 20. Find three consecutive numbers such that the ratio of the first to the second is equal to the ratio of 5 times the third to 5 times the first plus 16. Variation 101 Direct Proportion: If a train travels... | |
 | Henry Sinclair Hall - 1918 - 382 pages
...ж = y, or г = ж + y. У PROPORTION. 348. DEFINITION. Four quantities are said to be in proportion when the ratio of the first to the second is equal to the ratio of the third to the fourth. The four quantities are called proportionals, or the terms of the proportion.... | |
 | Emile Borel - Relativity (Physics) - 1926 - 256 pages
...diagonal and side of a square, we can easily prove by geometry that the ratio of the first remainder to the second is equal to the ratio of the second to the third, and so on; it is therefore impossible that the operation should come to an end. This geometrical fact... | |
 | 646 pages
...4cd c2+d2 Continued Proportion Quantities of the same kinds are said to be in continued proportion when the ratio of the first to the second is equal to the ratio of the second to the third and is equal to the ratio of the third to the fourth, and so on. Thus, a, b, c, d, ... are in continued... | |
 | 890 pages
...started. В : PROPORTION 1.4 Definition Four quantities are said to be in proportion or proportional if the ratio of the first to the second is equal to the ratio of the third to the fourth. Thus a, b, c, d are in the proportion or proportional if the ratio of 'a to b... | |
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Four quantities are in proportion when the ratio of the first to the second is equal to the ratio of the third to the fourth. 
