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Finding the Fourth Proportional to 276.75, 381.92 and 203.41

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Solution

The fourth proportional to 276.75, 381.92 and 203.41 is: 280.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.75 : 381.92 = 203.41 : x
  2. Step 2: Convert to fraction form
    276.75/381.92 = 203.41/x
  3. Step 3: Cross multiply
    276.75x = 381.92 × 203.41
  4. Step 4: Simplify right side
    276.75x = 77,685.81
  5. Step 5: Solve for x
    x = 77,685.81/276.75
  6. Step 6: Final answer
    x = 280.71

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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.