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Finding the Fourth Proportional to 276.90, 415.26 and 168.68

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Solution

The fourth proportional to 276.90, 415.26 and 168.68 is: 252.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.90 : 415.26 = 168.68 : x
  2. Step 2: Convert to fraction form
    276.90/415.26 = 168.68/x
  3. Step 3: Cross multiply
    276.90x = 415.26 × 168.68
  4. Step 4: Simplify right side
    276.90x = 70,043.98
  5. Step 5: Solve for x
    x = 70,043.98/276.90
  6. Step 6: Final answer
    x = 252.96

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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.