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Finding the Third Proportional to 276.75 and 387.88

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Solution

The third proportional to 276.75 and 387.88 is: 543.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.75 : 387.88 = 387.88 : x
  2. Step 2: Convert to fraction form
    276.75/387.88 = 387.88/x
  3. Step 3: Cross multiply
    276.75x = 387.88 × 387.88
  4. Step 4: Simplify right side
    276.75x = 150,447.02
  5. Step 5: Solve for x
    x = 150,447.02/276.75
  6. Step 6: Final answer
    x = 543.62

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.