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Finding the Fourth Proportional to 528.12, 791.92 and 239.36

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Solution

The fourth proportional to 528.12, 791.92 and 239.36 is: 358.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.12 : 791.92 = 239.36 : x
  2. Step 2: Convert to fraction form
    528.12/791.92 = 239.36/x
  3. Step 3: Cross multiply
    528.12x = 791.92 × 239.36
  4. Step 4: Simplify right side
    528.12x = 189,553.97
  5. Step 5: Solve for x
    x = 189,553.97/528.12
  6. Step 6: Final answer
    x = 358.92

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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.