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Finding the Third Proportional to 391,969 and 855,285

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Solution

The third proportional to 391,969 and 855,285 is: 1,866,250.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,969 : 855,285 = 855,285 : x
  2. Step 2: Convert to fraction form
    391,969/855,285 = 855,285/x
  3. Step 3: Cross multiply
    391,969x = 855,285 × 855,285
  4. Step 4: Simplify right side
    391,969x = 731,512,431,225
  5. Step 5: Solve for x
    x = 731,512,431,225/391,969
  6. Step 6: Final answer
    x = 1,866,250.73

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.