Q. Find the number that makes the ratio equivalent to 1:7.2:____
Multiply by 2: Multiply 1 by 2 to scale it up to the first term of the ratio we have, which is 2. Calculation: 1×2=2.
Maintain Proportion: Since we multiplied the first term of the ratio by 2, we need to do the same to the second term to maintain the proportion. Calculation: 7×2=14.
Write Answer: Write the answer. The ratio 2:____ is equivalent to 1:7 when the blank is filled with 14.