AL/RATIO & PROPORTIONS 001 1. If a : b = 5 : 9 and b : c = 4 : 7. Find a : b : c 2. If a : b = 2 : 3 , b : c = 4 : 5 and c : d = 6 : 7, then a : d is I. Find a : b : c : d 3. The number to added to each of the numbers 7,16,43,79 to make the number in proportion is 4. If A : B : C = 2: 3: 4 then is equal to 5. If A : B = , B : C = and C : D = then ratio A : B : C : D is 6. 2A = 3B = 4C then A : B : C is 7. ...