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Finding the Third Proportional to 680,843.25 and 989,340.75

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Solution

The third proportional to 680,843.25 and 989,340.75 is: 1,437,621.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,843.25 : 989,340.75 = 989,340.75 : x
  2. Step 2: Convert to fraction form
    680,843.25/989,340.75 = 989,340.75/x
  3. Step 3: Cross multiply
    680,843.25x = 989,340.75 × 989,340.75
  4. Step 4: Simplify right side
    680,843.25x = 978,795,119,610.56
  5. Step 5: Solve for x
    x = 978,795,119,610.56/680,843.25
  6. Step 6: Final answer
    x = 1,437,621.83

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.