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Finding the Fourth Proportional to 439.40, 658.68 and 165.32

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Solution

The fourth proportional to 439.40, 658.68 and 165.32 is: 247.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.40 : 658.68 = 165.32 : x
  2. Step 2: Convert to fraction form
    439.40/658.68 = 165.32/x
  3. Step 3: Cross multiply
    439.40x = 658.68 × 165.32
  4. Step 4: Simplify right side
    439.40x = 108,892.98
  5. Step 5: Solve for x
    x = 108,892.98/439.40
  6. Step 6: Final answer
    x = 247.82

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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.