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Finding the Fourth Proportional to 243.31, 335.78 and 132.80

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Solution

The fourth proportional to 243.31, 335.78 and 132.80 is: 183.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.31 : 335.78 = 132.80 : x
  2. Step 2: Convert to fraction form
    243.31/335.78 = 132.80/x
  3. Step 3: Cross multiply
    243.31x = 335.78 × 132.80
  4. Step 4: Simplify right side
    243.31x = 44,591.58
  5. Step 5: Solve for x
    x = 44,591.58/243.31
  6. Step 6: Final answer
    x = 183.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.