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Finding the Fourth Proportional to 439.35, 658.28 and 265.48

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Solution

The fourth proportional to 439.35, 658.28 and 265.48 is: 397.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.35 : 658.28 = 265.48 : x
  2. Step 2: Convert to fraction form
    439.35/658.28 = 265.48/x
  3. Step 3: Cross multiply
    439.35x = 658.28 × 265.48
  4. Step 4: Simplify right side
    439.35x = 174,761.24
  5. Step 5: Solve for x
    x = 174,761.24/439.35
  6. Step 6: Final answer
    x = 397.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.