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Finding the Fourth Proportional to 638.52, 958.32 and 422.52

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Solution

The fourth proportional to 638.52, 958.32 and 422.52 is: 634.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.52 : 958.32 = 422.52 : x
  2. Step 2: Convert to fraction form
    638.52/958.32 = 422.52/x
  3. Step 3: Cross multiply
    638.52x = 958.32 × 422.52
  4. Step 4: Simplify right side
    638.52x = 404,909.37
  5. Step 5: Solve for x
    x = 404,909.37/638.52
  6. Step 6: Final answer
    x = 634.14

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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.