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Finding the Fourth Proportional to 276.27, 414.20 and 113.86

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Solution

The fourth proportional to 276.27, 414.20 and 113.86 is: 170.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.27 : 414.20 = 113.86 : x
  2. Step 2: Convert to fraction form
    276.27/414.20 = 113.86/x
  3. Step 3: Cross multiply
    276.27x = 414.20 × 113.86
  4. Step 4: Simplify right side
    276.27x = 47,160.97
  5. Step 5: Solve for x
    x = 47,160.97/276.27
  6. Step 6: Final answer
    x = 170.71

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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.