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Finding the Fourth Proportional to 232.18, 320.42 and 138.94

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Solution

The fourth proportional to 232.18, 320.42 and 138.94 is: 191.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    232.18 : 320.42 = 138.94 : x
  2. Step 2: Convert to fraction form
    232.18/320.42 = 138.94/x
  3. Step 3: Cross multiply
    232.18x = 320.42 × 138.94
  4. Step 4: Simplify right side
    232.18x = 44,517.66
  5. Step 5: Solve for x
    x = 44,517.66/232.18
  6. Step 6: Final answer
    x = 191.74

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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.