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Finding the Fourth Proportional to 440.37, 660.59 and 132.21

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Solution

The fourth proportional to 440.37, 660.59 and 132.21 is: 198.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.37 : 660.59 = 132.21 : x
  2. Step 2: Convert to fraction form
    440.37/660.59 = 132.21/x
  3. Step 3: Cross multiply
    440.37x = 660.59 × 132.21
  4. Step 4: Simplify right side
    440.37x = 87,335.94
  5. Step 5: Solve for x
    x = 87,335.94/440.37
  6. Step 6: Final answer
    x = 198.32

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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.