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Finding the Fourth Proportional to 243.25, 335.68 and 132.72

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Solution

The fourth proportional to 243.25, 335.68 and 132.72 is: 183.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.25 : 335.68 = 132.72 : x
  2. Step 2: Convert to fraction form
    243.25/335.68 = 132.72/x
  3. Step 3: Cross multiply
    243.25x = 335.68 × 132.72
  4. Step 4: Simplify right side
    243.25x = 44,551.45
  5. Step 5: Solve for x
    x = 44,551.45/243.25
  6. Step 6: Final answer
    x = 183.15

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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.