 | Thomas J. Foster - Coal mines and mining - 1905 - 698 pages
...are the extrema, and the second and third are the means. Quantities are in proportion by alternation when antecedent is compared with antecedent and consequent with consequent. Thus, if 10 : 6 : : 4 : 2, then 10 : 4 : : 5 : 2. Quantities are in proportion by inversion when the antecedents... | |
 | International Correspondence Schools - Naval art and science - 1911 - 450 pages
...are the extremes, and the second and third are the means. Quantities are in proportion by alternation when antecedent is compared with antecedent and consequent with consequent. Thus, if 10:5 — 4:2. then 10:4 — 5:2. Quantities are in proportion by in version when antecedents are made... | |
 | Thomas J. Foster - Coal mines and mining - 1916 - 1230 pages
...earned, $20 and y dollars, are the consequents or effects. Quantities are in proportion by alternation when antecedent is compared with antecedent and consequent with consequent. Thus, if 10 : 5 = 4 : 2, then 10 : 4 = 5 : 2. Quantities are in proportion by inversion when the antecedents... | |
 | Charles Davies - Algebra - 1891 - 312 pages
...if we have the proportion 3 : 6 : : 8 : 16, the inverse proportion would be 6 : 3 : : 16 : 8. 190. Quantities are said to be in proportion by alternation,...the alternate proportion would be 3 : 8 : : 6 : 16. 191. Quantities are said to be in proportion by composition when the sum of the antecedent and consequent... | |
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Quantities are said to be in proportion by composition, when the sum of the antecedent and consequent is compared either with antecedent or consequent. 
