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Finding the Fourth Proportional to 363.78, 502.07 and 239.55

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Solution

The fourth proportional to 363.78, 502.07 and 239.55 is: 330.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.78 : 502.07 = 239.55 : x
  2. Step 2: Convert to fraction form
    363.78/502.07 = 239.55/x
  3. Step 3: Cross multiply
    363.78x = 502.07 × 239.55
  4. Step 4: Simplify right side
    363.78x = 120,270.87
  5. Step 5: Solve for x
    x = 120,270.87/363.78
  6. Step 6: Final answer
    x = 330.61

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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.