| Mathematics - 1915 - 832 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. :: $25 : $10... | |
| Harry Morton Keal, Nancy Seymour Phelps - Mathematics - 1917 - 240 pages
...x+5 x+25 x-4 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... | |
| Harry Morton Keal - Mathematics - 1917 - 148 pages
...ratio of 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... | |
| George Hervey Hallett, Robert Franklin Anderson - Algebra - 1917 - 432 pages
...а с 174. Continued proportion. Three or more numbers 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 so on. Thus, a, 6, c, d are in continued proportion if, 175. Mean proportional.... | |
| Henry Sinclair Hall - 1918 - 382 pages
...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. Thus, if - =... | |
| 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 be equal to а... | |
| 646 pages
...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,... | |
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