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Finding the Fourth Proportional to 438.74, 658.53 and 327.68

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Solution

The fourth proportional to 438.74, 658.53 and 327.68 is: 491.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.74 : 658.53 = 327.68 : x
  2. Step 2: Convert to fraction form
    438.74/658.53 = 327.68/x
  3. Step 3: Cross multiply
    438.74x = 658.53 × 327.68
  4. Step 4: Simplify right side
    438.74x = 215,787.11
  5. Step 5: Solve for x
    x = 215,787.11/438.74
  6. Step 6: Final answer
    x = 491.83

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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.