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Finding the Fourth Proportional to 279.29, 385.36 and 168.80

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Solution

The fourth proportional to 279.29, 385.36 and 168.80 is: 232.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.29 : 385.36 = 168.80 : x
  2. Step 2: Convert to fraction form
    279.29/385.36 = 168.80/x
  3. Step 3: Cross multiply
    279.29x = 385.36 × 168.80
  4. Step 4: Simplify right side
    279.29x = 65,046.42
  5. Step 5: Solve for x
    x = 65,046.42/279.29
  6. Step 6: Final answer
    x = 232.90

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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.