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Finding the Fourth Proportional to 276.19, 381.13 and 151.85

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Solution

The fourth proportional to 276.19, 381.13 and 151.85 is: 209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.19 : 381.13 = 151.85 : x
  2. Step 2: Convert to fraction form
    276.19/381.13 = 151.85/x
  3. Step 3: Cross multiply
    276.19x = 381.13 × 151.85
  4. Step 4: Simplify right side
    276.19x = 57,874.59
  5. Step 5: Solve for x
    x = 57,874.59/276.19
  6. Step 6: Final answer
    x = 209.55

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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.