1/6:1/3:1/9.
The smallest fraction is 1/9. To make this 1 we multiply by 9, so we need to do the same to the other fractions:
9/6:9/3:1, that is: 3/2:3:1 or 1.5:3:1.
7⅓:9:9⅜.
9⅜ can be expressed as 75/8.
Note that 2/6=⅓. 7⅓ is the smallest number. Divide all the ratios by this number which can be expressed as 22/3:
1:9/(22/3):(75/8)/(22/3).
To divide by a fraction we simply interchange numerator and denominator and multiply:
1:9×3/22:(75/8)×3/22=1:27/22:225/176.
The decimal approximation is 1:1.23:1.28.