The phrase "mathematical ratio" is correct and commonly used in written English.
It refers to the comparison of two numbers or quantities using mathematical operations such as division. Example: In order to find the speed of an object, you must calculate its distance traveled over time. This can be expressed as a mathematical ratio, represented as speed = distance/time.
Therefore a musical interval between two notes can be expressed as a mathematical ratio between the lengths of two strings.
They are marked with dimensions according to a system of mathematical ratio.
Because of this, Stephen Hawking and others have suggested that the difference in perceptions of time amounts to a specific mathematical ratio.
— There is an evolving mathematical ratio, in inverse proportion, that is helping the Yankees win baseball games lately.
Her art, including "An ABC Book of Invertebrates," a rendering of the mathematical ratio pi, an image of a migraine aura and other works, is at two Web sites: members.shaw.ca/adms and memory.ucsf.edu/Art/gallery.htm.htm
In musical theory, Aristoxenus held that the notes of the scale should not be judged by mathematical ratio but by the ear.
The pieces present intensely complex thematic and rhythmically jumpy lines that are repeated in canon at dramatically different tempos according to precise mathematical ratios.
He found this capacity essential, he said, because he writes music using an archaic tuning system known as "just intonation," in which the distances between notes are determined by simple mathematical ratios.
The next step in harmonic theory was to describe an entire octave length scale in terms of mathematical ratios.
One of the easiest ways of analyzing an annual report is through the use of mathematical ratios.
The heavenly bodies also appear to have moved in accordance with the mathematical ratios that govern the concordant musical intervals in order to produce a music of the heavens, which in the later tradition developed into "the harmony of the spheres".
