Finding the Third Proportional to 47 and 55
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Solution
The third proportional to 47 and 55 is: 64.36
Step by Step Solution
- Step 1: Write the proportion equation
47 : 55 = 55 : x - Step 2: Convert to fraction form
47/55 = 55/x - Step 3: Cross multiply
47x = 55 × 55 - Step 4: Simplify right side
47x = 3,025 - Step 5: Solve for x
x = 3,025/47 - Step 6: Final answer
x = 64.36
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Why These Related Problems?
These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.