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Finding the Third Proportional to 200.88 and 387.88

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Solution

The third proportional to 200.88 and 387.88 is: 748.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.88 : 387.88 = 387.88 : x
  2. Step 2: Convert to fraction form
    200.88/387.88 = 387.88/x
  3. Step 3: Cross multiply
    200.88x = 387.88 × 387.88
  4. Step 4: Simplify right side
    200.88x = 150,447.02
  5. Step 5: Solve for x
    x = 150,447.02/200.88
  6. Step 6: Final answer
    x = 748.96

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Why These Related Problems?

These problems maintain the same ratio (1.93) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.