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Finding the Fourth Proportional to 204.60, 306.92 and 143.76

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Solution

The fourth proportional to 204.60, 306.92 and 143.76 is: 215.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.60 : 306.92 = 143.76 : x
  2. Step 2: Convert to fraction form
    204.60/306.92 = 143.76/x
  3. Step 3: Cross multiply
    204.60x = 306.92 × 143.76
  4. Step 4: Simplify right side
    204.60x = 44,122.82
  5. Step 5: Solve for x
    x = 44,122.82/204.60
  6. Step 6: Final answer
    x = 215.65

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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.