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Finding the Third Proportional to 138.38 and 200.44

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Solution

The third proportional to 138.38 and 200.44 is: 290.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.38 : 200.44 = 200.44 : x
  2. Step 2: Convert to fraction form
    138.38/200.44 = 200.44/x
  3. Step 3: Cross multiply
    138.38x = 200.44 × 200.44
  4. Step 4: Simplify right side
    138.38x = 40,177.54
  5. Step 5: Solve for x
    x = 40,177.54/138.38
  6. Step 6: Final answer
    x = 290.35

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.