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Finding the Fourth Proportional to 234.46, 351.79 and 80.31

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Solution

The fourth proportional to 234.46, 351.79 and 80.31 is: 120.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.46 : 351.79 = 80.31 : x
  2. Step 2: Convert to fraction form
    234.46/351.79 = 80.31/x
  3. Step 3: Cross multiply
    234.46x = 351.79 × 80.31
  4. Step 4: Simplify right side
    234.46x = 28,251.85
  5. Step 5: Solve for x
    x = 28,251.85/234.46
  6. Step 6: Final answer
    x = 120.50

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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.