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Finding the Fourth Proportional to 527.72, 791.30 and 239

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Solution

The fourth proportional to 527.72, 791.30 and 239 is: 358.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.72 : 791.30 = 239 : x
  2. Step 2: Convert to fraction form
    527.72/791.30 = 239/x
  3. Step 3: Cross multiply
    527.72x = 791.30 × 239
  4. Step 4: Simplify right side
    527.72x = 189,120.70
  5. Step 5: Solve for x
    x = 189,120.70/527.72
  6. Step 6: Final answer
    x = 358.37

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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.