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Finding the Fourth Proportional to 276.78, 381.48 and 237.15

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Solution

The fourth proportional to 276.78, 381.48 and 237.15 is: 326.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.78 : 381.48 = 237.15 : x
  2. Step 2: Convert to fraction form
    276.78/381.48 = 237.15/x
  3. Step 3: Cross multiply
    276.78x = 381.48 × 237.15
  4. Step 4: Simplify right side
    276.78x = 90,467.98
  5. Step 5: Solve for x
    x = 90,467.98/276.78
  6. Step 6: Final answer
    x = 326.86

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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.