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7.) The marks obtained by four examinees are as follows: A:B = 2:3, B:C = 4:5, C:D = 7:9, find the
continued ratio.
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Answer:
A : B = 2 : 3
B : C = 4 : 5
C : D = 7 : 9
B is common in the first and second ratio :
The LCM of 3 and 4 is :
12
We multiply the first ratio by 4 and the second ratio by 3.
A : B = 8 : 12
B : C = 12 : 15
A : B : C = 8 : 12 : 15
C : D = 7 : 9
The LCM of 7 and 15 is 105
We multiply the ratio of A : B : C by 7 and C : D by 15
A : B : C = 56 : 84 : 105
C : D = 105 : 135
A : B : C : D = 56 : 84 : 105 : 135
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