Perfect fifth
In just intonation, pitches a fifth apart have a 2:3 (“two-to-three") frequency ratio. If one pitch is at 300 Hz, a pitch a fifth higher is at 450 Hz. A pitch a fifth lower is at 200 Hz.
In 12 tone equal temperament, pitches a fifth apart have a difference of 700 centsA cent is a unit of measurement for intervals and is defined as 1/1200th of an octave.Visit the link to learn more. If one pitch is at 300 Hz, a pitch a fifth higher is at 449.492 Hz. A pitch a fifth lower is at 200.226 Hz.
Context
A Guide to the Maqam Tuning Presets for Ableton Live 12, Introduction to EDO tunings, 9-ED3_2 Wendy Carlos alpha, 11-ED3_2 Wendy Carlos beta, 20-ED3_2 Wendy Carlos gamma, 22-EDO, 24-EDO, 31-EDO, 35-EDO, 36-EDO, 41-EDO, 43-EDO, 53-EDO, 55-EDO, 72-EDO, Introduction to European historical tunings and temperaments, 12 Henricus Grammateus, 12 Meantone (one-fifth quintal-comma), 12 Meantone (one-quarter quintal-comma), 12 Meantone (one-sixth tertial-comma), 12 Meantone (one-third quintal-comma), 12 Meantone (two-sevenths quintal-comma), 12 Tertial Eflat-Gsharp (center C), 12 Tertial Gflat-B (center C), 12 Tertial-Quintal (Erlanger Traktat), 12 WT (d'Alembert-Rousseau), 12 WT (Kellner), 12 WT (Kirnberger III), 12 WT (Lehmann), 12 WT (Marpourg), 12 WT (Neihardt Grosse), 12 WT (Neihardt Kleine), 12 WT (Rameau), 12 WT (Vallotti), 12 WT (Werkmeister III), 24 Helmholtz temperament, 12 HS 16-32 (Johnston), 12 HS 16-32 (Tenney), 12 Quintal (center C), 12 Quintal-Septimal (center C), 12 Tertial Dflat-Fsharp (center C), 12 Tertial-Septimal LMY WTP, 12 Undecimal Lou Harrison National Steel, 16 HS 16-32 (fundamental F), 22 Sruti (center C), 43 Undecimal Partch G-392Hz, 53 Tertial, 55 Tertial-Quintal Sabat Euler Lattice