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Finding the Fourth Proportional to 204.20, 305.90 and 112.62

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Solution

The fourth proportional to 204.20, 305.90 and 112.62 is: 168.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.20 : 305.90 = 112.62 : x
  2. Step 2: Convert to fraction form
    204.20/305.90 = 112.62/x
  3. Step 3: Cross multiply
    204.20x = 305.90 × 112.62
  4. Step 4: Simplify right side
    204.20x = 34,450.46
  5. Step 5: Solve for x
    x = 34,450.46/204.20
  6. Step 6: Final answer
    x = 168.71

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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.