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Finding the Fourth Proportional to 392.48, 588.64 and 132.48

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Solution

The fourth proportional to 392.48, 588.64 and 132.48 is: 198.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.48 : 588.64 = 132.48 : x
  2. Step 2: Convert to fraction form
    392.48/588.64 = 132.48/x
  3. Step 3: Cross multiply
    392.48x = 588.64 × 132.48
  4. Step 4: Simplify right side
    392.48x = 77,983.03
  5. Step 5: Solve for x
    x = 77,983.03/392.48
  6. Step 6: Final answer
    x = 198.69

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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.