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Finding the Third Proportional to 306,762 and 628,398

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Solution

The third proportional to 306,762 and 628,398 is: 1,287,265.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,762 : 628,398 = 628,398 : x
  2. Step 2: Convert to fraction form
    306,762/628,398 = 628,398/x
  3. Step 3: Cross multiply
    306,762x = 628,398 × 628,398
  4. Step 4: Simplify right side
    306,762x = 394,884,046,404
  5. Step 5: Solve for x
    x = 394,884,046,404/306,762
  6. Step 6: Final answer
    x = 1,287,265.20

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.