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Finding the Fourth Proportional to 204.31, 306.56 and 82.68

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Solution

The fourth proportional to 204.31, 306.56 and 82.68 is: 124.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.31 : 306.56 = 82.68 : x
  2. Step 2: Convert to fraction form
    204.31/306.56 = 82.68/x
  3. Step 3: Cross multiply
    204.31x = 306.56 × 82.68
  4. Step 4: Simplify right side
    204.31x = 25,346.38
  5. Step 5: Solve for x
    x = 25,346.38/204.31
  6. Step 6: Final answer
    x = 124.06

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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.