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Finding the Fourth Proportional to 276.08, 381.08 and 159.68

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Solution

The fourth proportional to 276.08, 381.08 and 159.68 is: 220.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.08 : 381.08 = 159.68 : x
  2. Step 2: Convert to fraction form
    276.08/381.08 = 159.68/x
  3. Step 3: Cross multiply
    276.08x = 381.08 × 159.68
  4. Step 4: Simplify right side
    276.08x = 60,850.85
  5. Step 5: Solve for x
    x = 60,850.85/276.08
  6. Step 6: Final answer
    x = 220.41

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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.