 | Pierce Morton - Geometry - 1830 - 584 pages
...written, A : В : : С : D. te " A is to В as С is to D." Of a proportion, the first and last terms are called the extremes, and the second and third the means ; thus A, D are the extremes, and В, С the means, of the proportion A : B: : С : D. The terms A and С... | |
 | Mathematics - 1835 - 684 pages
...written, A : В : : С : D. ie " A is to В as С is to D." Of a proportion, the first and last terms are called the extremes, and the second and third the means ; thus A, D are the extremes, and В, С the means, of the proportion A : B; : С : D. The terms A and С... | |
 | George Roberts Perkins - Arithmetic - 1841 - 274 pages
...fourth, and four points are placed between the second and third : which is read, 4 is to 6 as 8 is to 12. The first and fourth terms of a proportion are called the extremes. The second and third terms are called the means. The first and second constitute the fast couplet.... | |
 | Pliny Earle Chase - 1844 - 164 pages
...consequents may exchange places. Thus, 2 : 6 :: 7 : 21, and 6 :2 :: 21 :7, are each true proportions. The first and fourth terms of a proportion, are called the extremes, the second and third terms, the means. The proportion 3 : 12 == 2 : 8 may also be written 735 = f .... | |
 | Anna Cabot Lowell - Geometry - 1846 - 216 pages
...divided by BC. The first term of each ratio is called the antecedent, the second term is the consequent. The first and fourth terms of a proportion are called the extremes ; the second and third terms are the means. If the same quantity is taken twice as a mean it is called... | |
 | Isaac A. Clark - Arithmetic - 1846 - 218 pages
...12 : : 3 : 4, or 12 : 9 : : 4 : 3, are each true proportions. § The first and fourth terms of every proportion are called the extremes, and the second and third the means. § The proportion 4 is to 7 as 12 is to 21, or 4 : 7 :: 12: 21, may be written thus ; y=M • § If... | |
 | James S. Russell - Arithmetic - 1847 - 340 pages
...The four quantities forming a proportion are called proportionals, or, the terms of the proportion. The first and fourth terms of a proportion are called...the extremes, and the second and third, the means. Also, the first terms, or divisors in ratios, are called the antecedents, and the second terms, or... | |
 | James Robinson (of Boston.) - 1847 - 304 pages
...expression is usually read thus : as 5 is to 8, so is 15 to 24. Art. 138. The first and fourth numbers or terms of a proportion are called the extremes, and the second and third numbers or terms are called the means. In the other method of writing the terms, the numerator of the... | |
 | Rufus Putnam - Arithmetic - 1849 - 276 pages
...± = |f ; which is read, 4 is to 5 as 12 is to 15 ; or, 4 divided by 5 is equal to 12 divided by 15. The first and fourth terms of a proportion are called...the extremes; and the second and third, the means. When the proportion is expressed in a fractional form, the numerator of the first fraction and the... | |
 | George Roberts Perkins - Arithmetic - 1849 - 356 pages
...fourth, and four points are placed between the second and third ; which is read, 4 is to 6 as 8 is to 12. The first and fourth terms of a proportion are called the extremes. The second and third terms are called the means. The first and second constitute the first couplet.... | |
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The first and fourth terms of a proportion are called the extremes, and the second and third terms, the means. Thus, in the foregoing proportion, 8 and 3 are the extremes and 4 and 6 are the means. 
