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Finding the Fourth Proportional to 527.63, 791.78 and 239.09

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Solution

The fourth proportional to 527.63, 791.78 and 239.09 is: 358.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.63 : 791.78 = 239.09 : x
  2. Step 2: Convert to fraction form
    527.63/791.78 = 239.09/x
  3. Step 3: Cross multiply
    527.63x = 791.78 × 239.09
  4. Step 4: Simplify right side
    527.63x = 189,301.53
  5. Step 5: Solve for x
    x = 189,301.53/527.63
  6. Step 6: Final answer
    x = 358.78

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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.