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Finding the Fourth Proportional to 239.22, 358.82 and 76.92

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Solution

The fourth proportional to 239.22, 358.82 and 76.92 is: 115.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.22 : 358.82 = 76.92 : x
  2. Step 2: Convert to fraction form
    239.22/358.82 = 76.92/x
  3. Step 3: Cross multiply
    239.22x = 358.82 × 76.92
  4. Step 4: Simplify right side
    239.22x = 27,600.43
  5. Step 5: Solve for x
    x = 27,600.43/239.22
  6. Step 6: Final answer
    x = 115.38

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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.