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Finding the Fourth Proportional to 462.52, 638.12 and 287.96

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Solution

The fourth proportional to 462.52, 638.12 and 287.96 is: 397.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.52 : 638.12 = 287.96 : x
  2. Step 2: Convert to fraction form
    462.52/638.12 = 287.96/x
  3. Step 3: Cross multiply
    462.52x = 638.12 × 287.96
  4. Step 4: Simplify right side
    462.52x = 183,753.04
  5. Step 5: Solve for x
    x = 183,753.04/462.52
  6. Step 6: Final answer
    x = 397.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.