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Finding the Fourth Proportional to 439.18, 658.51 and 179.31

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Solution

The fourth proportional to 439.18, 658.51 and 179.31 is: 268.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.18 : 658.51 = 179.31 : x
  2. Step 2: Convert to fraction form
    439.18/658.51 = 179.31/x
  3. Step 3: Cross multiply
    439.18x = 658.51 × 179.31
  4. Step 4: Simplify right side
    439.18x = 118,077.43
  5. Step 5: Solve for x
    x = 118,077.43/439.18
  6. Step 6: Final answer
    x = 268.86

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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.