 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. A proportion may be written in either of  Plane Geometry - Page 89by George D. Pettee - 1896 - 253 pagesFull view - About this book
 | Charles Hutton - Mathematics - 1811 - 406 pages
...quantity. 17. Proportion is an equality of ratios. Thus, 78. Three quantities are said to be Proportional, when the ratio of the first to the second is equal to the ratio of the second to the third. As of the three quantities A (2), B (4), c (8), where £ = -J = 2, both the same... | |
 | Charles Hutton - Mathematics - 1811 - 406 pages
...&c. 77. Proportion is an equaiity of ratios. Thus, 78. Three quantities are said to be Proportional, when the ratio of the first to the second is equal to the ratio of the second to the third. As of the three quantities A (2), B (4), c (8), where ¿ = -J = 2, both the same... | |
 | Charles Hutton - Mathematics - 1812 - 620 pages
...5ec. 77. Proportion is an equality of ratios. Thus, 78. Three quantities are said to be Proportional, when the ratio of the first to the second is equal to the ratio of the second to the third. As of the three quantities A (2), B (4), c (8), where .J ;= | = 2, both the same... | |
 | Charles Hutton - Mathematics - 1816 - 610 pages
...Etc. 77. Proportion is an equality of ratios. Thus, 78. Three quantities are said to be Proportional, When the ratio of the first to the second is equal to the ratio of the second to the third. As of the three quantities A (2), a (4), c (8), where £ = { = 2, both the same... | |
 | Charles Hutton - Arithmetic - 1818 - 646 pages
...quantity 77. Proportion is an equality of ratios. Thus, 78. Three quantities are said to be Proportional, when the ratio of the first to the second is equal to the ratio of the second to the third. As of the three quantities A (2), a (4), c (8), where '=;—'<-', both the same... | |
 | James Hayward - Geometry - 1829 - 218 pages
...idea of what is meant by the ratio of one line to another. 77. When four magnitudes are such that the ratio of the first to the second, is equal to the ratio of the third to the fourth, these four magnitudes are said to be in proportion. Proportion is equality of ratios. "A PROPORTION,"... | |
 | Ira Wanzer - Arithmetic - 1831 - 408 pages
...the ratio. Thus, 3 : 5, denotes the ratio of 3 to 5. Four quantities are said to be in geometrical proportion, when the ratio of the first to the second...is equal to the ratio of the third to the fourth. Thus, the four numbers 8, 4, 14, 7, are proportional, because the ratio 8: 4 is equal to the ratio... | |
 | Industrial arts - 1835 - 398 pages
...2. Proportion is an equality of ratios. Thus— 3. Three quantities are said to be proper, tional, when the ratio of the first to the second is equal to the ratio of the second to the third. As of the three quantities A (2), A (4), с (8), where two fourths are equal to... | |
 | Charles Davies - Arithmetic - 1846 - 378 pages
...term, 4th term. This relation between four numbers is called proportion ; and generally Four numbers are said to be in proportion when the ratio of the first to the second is the same as that of the third to the fourth. Hence, " PROPORTION" is an equality of ratios between... | |
 | Charles Davies - Arithmetic - 1846 - 370 pages
...to the fourth. This relation between four numbers is called proportion; and generally Four numbers are said to be in proportion when the ratio of the first to the second is the same as that of the third to the fourth. Hence, PROPORTION is an equality of ratios between numbers... | |
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