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Finding the Fourth Proportional to 502.12, 752.03 and 422.61

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Solution

The fourth proportional to 502.12, 752.03 and 422.61 is: 632.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.12 : 752.03 = 422.61 : x
  2. Step 2: Convert to fraction form
    502.12/752.03 = 422.61/x
  3. Step 3: Cross multiply
    502.12x = 752.03 × 422.61
  4. Step 4: Simplify right side
    502.12x = 317,814.43
  5. Step 5: Solve for x
    x = 317,814.43/502.12
  6. Step 6: Final answer
    x = 632.94

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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.