Finding the Third Proportional to 438 and 487
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Solution
The third proportional to 438 and 487 is: 541.48
Step by Step Solution
- Step 1: Write the proportion equation
438 : 487 = 487 : x - Step 2: Convert to fraction form
438/487 = 487/x - Step 3: Cross multiply
438x = 487 × 487 - Step 4: Simplify right side
438x = 237,169 - Step 5: Solve for x
x = 237,169/438 - Step 6: Final answer
x = 541.48
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These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.