Just intonation is based on intervals that are ratios of small whole numbers. The 12-tone equal temperament scale is historically a development of just intonat

Just intonation is based on intervals that are ratios of small whole numbers. The 12-tone equal temperament scale is historically a development of just intonation (a "fork" in software terms). So it's not a coincidence that 12-tone equal temperament intervals are close to ratios of small whole numbers.