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Finding the Fourth Proportional to 232.76, 321.22 and 129.26

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Solution

The fourth proportional to 232.76, 321.22 and 129.26 is: 178.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.76 : 321.22 = 129.26 : x
  2. Step 2: Convert to fraction form
    232.76/321.22 = 129.26/x
  3. Step 3: Cross multiply
    232.76x = 321.22 × 129.26
  4. Step 4: Simplify right side
    232.76x = 41,520.90
  5. Step 5: Solve for x
    x = 41,520.90/232.76
  6. Step 6: Final answer
    x = 178.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.