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Finding the Fourth Proportional to 306.76, 423.32 and 168.76

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Solution

The fourth proportional to 306.76, 423.32 and 168.76 is: 232.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.76 : 423.32 = 168.76 : x
  2. Step 2: Convert to fraction form
    306.76/423.32 = 168.76/x
  3. Step 3: Cross multiply
    306.76x = 423.32 × 168.76
  4. Step 4: Simplify right side
    306.76x = 71,439.48
  5. Step 5: Solve for x
    x = 71,439.48/306.76
  6. Step 6: Final answer
    x = 232.88

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