 Quantities are said to be in continued proportion when the first is to the second, as the second is to the third, as the third to the fourth ; and so on.  A School Algebra - Page 297by George Albert Wentworth - 1895 - 362 pagesFull view - About this book
 | Barnabas Hughes - Mathematics - 2007 - 412 pages
...necessary from his book, without further proof. [42] // three numbers or quantities are proportional, then the first is to the second as the second is to the third.31 Then the product of the first number by the third equals the product of the second by itself.... | |
 | 238 pages
...the first exceeds the second by the same amount as the second exceeds the third; the geometric mean when the first is to the second as the second is to the third; the "subcontrary" which we call the "harmonic" when the three terms are such that, by whatever part... | |
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