Golden ratio, a specific mathematical ratio (sometimes called golden mean)

How obvious, now, was that mathematical ratio of its sides, the quadratic sequence 1:4:9!

The pulse may be further indirectly observed under light absorbances of varying wavelengths with assigned and inexpensively reproduced mathematical ratios.

We are not concerned with a mathematical ratio and proportion.

With white and black at each extreme of the scale, colors are arranged in a series according to the mathematical ratio between the proportions of light and darkness.

When played at one part of a string, the opposed part starts to resonate, depending on a predictable mathematical ratio of the strings' lengths divided by the rod.

The proportions of each room within the villa were calculated on simple mathematical ratios like 3:4 and 4:5, and the different rooms within the house were interrelated by these ratios.

THE class of a dozen sixth graders at the Rippowam Cisqua School here eagerly raised hands in response to their teacher's questions on mathematical ratios.

"Regular" styles are defined by mathematical ratios (such as the golden mean) that are used to determine every measurement from the floor layout to the width to height ratio of the windows.

The car began to gather speed and altitude in a direct mathematical ratio which was of interest to the Professor alone.