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Finding the Fourth Proportional to 276.72, 381.90 and 178.44

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Solution

The fourth proportional to 276.72, 381.90 and 178.44 is: 246.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.72 : 381.90 = 178.44 : x
  2. Step 2: Convert to fraction form
    276.72/381.90 = 178.44/x
  3. Step 3: Cross multiply
    276.72x = 381.90 × 178.44
  4. Step 4: Simplify right side
    276.72x = 68,146.24
  5. Step 5: Solve for x
    x = 68,146.24/276.72
  6. Step 6: Final answer
    x = 246.26

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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.