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Finding the Fourth Proportional to 237.15, 327.21 and 138.87

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Solution

The fourth proportional to 237.15, 327.21 and 138.87 is: 191.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.15 : 327.21 = 138.87 : x
  2. Step 2: Convert to fraction form
    237.15/327.21 = 138.87/x
  3. Step 3: Cross multiply
    237.15x = 327.21 × 138.87
  4. Step 4: Simplify right side
    237.15x = 45,439.65
  5. Step 5: Solve for x
    x = 45,439.65/237.15
  6. Step 6: Final answer
    x = 191.61

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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.