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Finding the Fourth Proportional to 276.97, 415.65 and 168.43

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Solution

The fourth proportional to 276.97, 415.65 and 168.43 is: 252.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.97 : 415.65 = 168.43 : x
  2. Step 2: Convert to fraction form
    276.97/415.65 = 168.43/x
  3. Step 3: Cross multiply
    276.97x = 415.65 × 168.43
  4. Step 4: Simplify right side
    276.97x = 70,007.93
  5. Step 5: Solve for x
    x = 70,007.93/276.97
  6. Step 6: Final answer
    x = 252.76

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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.