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Finding the Fourth Proportional to 327.97, 492 and 111.61

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Solution

The fourth proportional to 327.97, 492 and 111.61 is: 167.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.97 : 492 = 111.61 : x
  2. Step 2: Convert to fraction form
    327.97/492 = 111.61/x
  3. Step 3: Cross multiply
    327.97x = 492 × 111.61
  4. Step 4: Simplify right side
    327.97x = 54,912.12
  5. Step 5: Solve for x
    x = 54,912.12/327.97
  6. Step 6: Final answer
    x = 167.43

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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.