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Finding the Fourth Proportional to 438.38, 658.50 and 276.18

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Solution

The fourth proportional to 438.38, 658.50 and 276.18 is: 414.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.38 : 658.50 = 276.18 : x
  2. Step 2: Convert to fraction form
    438.38/658.50 = 276.18/x
  3. Step 3: Cross multiply
    438.38x = 658.50 × 276.18
  4. Step 4: Simplify right side
    438.38x = 181,864.53
  5. Step 5: Solve for x
    x = 181,864.53/438.38
  6. Step 6: Final answer
    x = 414.86

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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.