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Finding the Fourth Proportional to 440.47, 660.64 and 132.31

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Solution

The fourth proportional to 440.47, 660.64 and 132.31 is: 198.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.47 : 660.64 = 132.31 : x
  2. Step 2: Convert to fraction form
    440.47/660.64 = 132.31/x
  3. Step 3: Cross multiply
    440.47x = 660.64 × 132.31
  4. Step 4: Simplify right side
    440.47x = 87,409.28
  5. Step 5: Solve for x
    x = 87,409.28/440.47
  6. Step 6: Final answer
    x = 198.45

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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.