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Finding the Third Proportional to 138.38 and 230.25

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Solution

The third proportional to 138.38 and 230.25 is: 383.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.38 : 230.25 = 230.25 : x
  2. Step 2: Convert to fraction form
    138.38/230.25 = 230.25/x
  3. Step 3: Cross multiply
    138.38x = 230.25 × 230.25
  4. Step 4: Simplify right side
    138.38x = 53,015.06
  5. Step 5: Solve for x
    x = 53,015.06/138.38
  6. Step 6: Final answer
    x = 383.13

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.