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Finding the Third Proportional to 275,217.75 and 421,034.25

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Solution

The third proportional to 275,217.75 and 421,034.25 is: 644,107.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,217.75 : 421,034.25 = 421,034.25 : x
  2. Step 2: Convert to fraction form
    275,217.75/421,034.25 = 421,034.25/x
  3. Step 3: Cross multiply
    275,217.75x = 421,034.25 × 421,034.25
  4. Step 4: Simplify right side
    275,217.75x = 177,269,839,673.06
  5. Step 5: Solve for x
    x = 177,269,839,673.06/275,217.75
  6. Step 6: Final answer
    x = 644,107.58

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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.