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Finding the Fourth Proportional to 440.52, 660.78 and 115.92

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Solution

The fourth proportional to 440.52, 660.78 and 115.92 is: 173.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.52 : 660.78 = 115.92 : x
  2. Step 2: Convert to fraction form
    440.52/660.78 = 115.92/x
  3. Step 3: Cross multiply
    440.52x = 660.78 × 115.92
  4. Step 4: Simplify right side
    440.52x = 76,594.02
  5. Step 5: Solve for x
    x = 76,594.02/440.52
  6. Step 6: Final answer
    x = 173.87

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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.