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Finding the Fourth Proportional to 276.53, 381.87 and 178.45

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Solution

The fourth proportional to 276.53, 381.87 and 178.45 is: 246.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.53 : 381.87 = 178.45 : x
  2. Step 2: Convert to fraction form
    276.53/381.87 = 178.45/x
  3. Step 3: Cross multiply
    276.53x = 381.87 × 178.45
  4. Step 4: Simplify right side
    276.53x = 68,144.70
  5. Step 5: Solve for x
    x = 68,144.70/276.53
  6. Step 6: Final answer
    x = 246.43

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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.