Question
Which of the following ratios are in proportion?
Answer: Option B
:
B
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B
Two ratios are said to be in proportion if they are equivalent or equal.
Here,
45=4×35×3=1215
Hence, 4 : 5 :: 12 : 15, are in proportion.
Also product of 1st and 4th term should be equal to product of 2nd and 3rd term, which is only satisfied by 4 : 5 :: 12 : 15, i.e.,
4×15=5×12=60.
For rest of them the product of 1st and 4th term is not equal to the product of 2nd and 3rd term.
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