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Finding the Fourth Proportional to 440.55, 660.86 and 132.43

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Solution

The fourth proportional to 440.55, 660.86 and 132.43 is: 198.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.55 : 660.86 = 132.43 : x
  2. Step 2: Convert to fraction form
    440.55/660.86 = 132.43/x
  3. Step 3: Cross multiply
    440.55x = 660.86 × 132.43
  4. Step 4: Simplify right side
    440.55x = 87,514.26
  5. Step 5: Solve for x
    x = 87,514.26/440.55
  6. Step 6: Final answer
    x = 198.65

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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.