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Finding the Third Proportional to 396,669 and 628,766

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Solution

The third proportional to 396,669 and 628,766 is: 996,666.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,669 : 628,766 = 628,766 : x
  2. Step 2: Convert to fraction form
    396,669/628,766 = 628,766/x
  3. Step 3: Cross multiply
    396,669x = 628,766 × 628,766
  4. Step 4: Simplify right side
    396,669x = 395,346,682,756
  5. Step 5: Solve for x
    x = 395,346,682,756/396,669
  6. Step 6: Final answer
    x = 996,666.45

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.