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Finding the Fourth Proportional to 276.80, 381.90 and 166.29

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Solution

The fourth proportional to 276.80, 381.90 and 166.29 is: 229.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.80 : 381.90 = 166.29 : x
  2. Step 2: Convert to fraction form
    276.80/381.90 = 166.29/x
  3. Step 3: Cross multiply
    276.80x = 381.90 × 166.29
  4. Step 4: Simplify right side
    276.80x = 63,506.15
  5. Step 5: Solve for x
    x = 63,506.15/276.80
  6. Step 6: Final answer
    x = 229.43

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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.