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Finding the Third Proportional to 263,198 and 408,279

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Solution

The third proportional to 263,198 and 408,279 is: 633,332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,198 : 408,279 = 408,279 : x
  2. Step 2: Convert to fraction form
    263,198/408,279 = 408,279/x
  3. Step 3: Cross multiply
    263,198x = 408,279 × 408,279
  4. Step 4: Simplify right side
    263,198x = 166,691,741,841
  5. Step 5: Solve for x
    x = 166,691,741,841/263,198
  6. Step 6: Final answer
    x = 633,332.10

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.