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Finding the Fourth Proportional to 502.38, 752.75 and 258.57

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Solution

The fourth proportional to 502.38, 752.75 and 258.57 is: 387.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.38 : 752.75 = 258.57 : x
  2. Step 2: Convert to fraction form
    502.38/752.75 = 258.57/x
  3. Step 3: Cross multiply
    502.38x = 752.75 × 258.57
  4. Step 4: Simplify right side
    502.38x = 194,637.27
  5. Step 5: Solve for x
    x = 194,637.27/502.38
  6. Step 6: Final answer
    x = 387.43

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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.