# Mean-proportionals Sentence Examples

The Belopoiica (on engines of war) is extant in Greek, and both this and the Mechanics contain Hero's solution of the problem of the two

**mean proportionals**.Hippocrates of Chios (c. 430 B.C.), the discoverer of the square of a lune, showed that the problem reduced to the determination of two

**mean proportionals**between two given lines, one of them being twice the length of the other.Briggs also gave methods of forming the

**mean proportionals**or square roots by differences; and the general method of constructing logarithmic tables by means of differences is due to him.The following calculation of log 5 is given as an example of the application of a method of

**mean proportionals**.Advertisement