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Finding the Fourth Proportional to 415.17, 572.72 and 249.28

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Solution

The fourth proportional to 415.17, 572.72 and 249.28 is: 343.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.17 : 572.72 = 249.28 : x
  2. Step 2: Convert to fraction form
    415.17/572.72 = 249.28/x
  3. Step 3: Cross multiply
    415.17x = 572.72 × 249.28
  4. Step 4: Simplify right side
    415.17x = 142,764.96
  5. Step 5: Solve for x
    x = 142,764.96/415.17
  6. Step 6: Final answer
    x = 343.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.