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Finding the Fourth Proportional to 237.20, 327.41 and 138.92

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Solution

The fourth proportional to 237.20, 327.41 and 138.92 is: 191.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.20 : 327.41 = 138.92 : x
  2. Step 2: Convert to fraction form
    237.20/327.41 = 138.92/x
  3. Step 3: Cross multiply
    237.20x = 327.41 × 138.92
  4. Step 4: Simplify right side
    237.20x = 45,481.99
  5. Step 5: Solve for x
    x = 45,481.99/237.20
  6. Step 6: Final answer
    x = 191.75

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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.