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Finding the Third Proportional to 322,920 and 658,980

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Solution

The third proportional to 322,920 and 658,980 is: 1,344,774.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,920 : 658,980 = 658,980 : x
  2. Step 2: Convert to fraction form
    322,920/658,980 = 658,980/x
  3. Step 3: Cross multiply
    322,920x = 658,980 × 658,980
  4. Step 4: Simplify right side
    322,920x = 434,254,640,400
  5. Step 5: Solve for x
    x = 434,254,640,400/322,920
  6. Step 6: Final answer
    x = 1,344,774.68

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.