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Finding the Third Proportional to 318,917.25 and 489,356.44

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Solution

The third proportional to 318,917.25 and 489,356.44 is: 750,883.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,917.25 : 489,356.44 = 489,356.44 : x
  2. Step 2: Convert to fraction form
    318,917.25/489,356.44 = 489,356.44/x
  3. Step 3: Cross multiply
    318,917.25x = 489,356.44 × 489,356.44
  4. Step 4: Simplify right side
    318,917.25x = 239,469,722,922.69
  5. Step 5: Solve for x
    x = 239,469,722,922.69/318,917.25
  6. Step 6: Final answer
    x = 750,883.57

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.