If A:B=2:3, B:C=5:7 and C:D=3:10, then find the value of A:D
It is a very simple proportional relationship:
A/D = A/B * B/C * C/D
A/D =2/3 * 5/7 * 3/10
A/D = 30 / 210 = 1 / 7
Therefore: A:D = 1 : 7
