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Finding the Third Proportional to 138.38 and 303

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Solution

The third proportional to 138.38 and 303 is: 663.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.38 : 303 = 303 : x
  2. Step 2: Convert to fraction form
    138.38/303 = 303/x
  3. Step 3: Cross multiply
    138.38x = 303 × 303
  4. Step 4: Simplify right side
    138.38x = 91,809
  5. Step 5: Solve for x
    x = 91,809/138.38
  6. Step 6: Final answer
    x = 663.48

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.