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Finding the Fourth Proportional to 276.30, 381.33 and 159.84

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Solution

The fourth proportional to 276.30, 381.33 and 159.84 is: 220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.30 : 381.33 = 159.84 : x
  2. Step 2: Convert to fraction form
    276.30/381.33 = 159.84/x
  3. Step 3: Cross multiply
    276.30x = 381.33 × 159.84
  4. Step 4: Simplify right side
    276.30x = 60,951.79
  5. Step 5: Solve for x
    x = 60,951.79/276.30
  6. Step 6: Final answer
    x = 220.60

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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.