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Finding the Third Proportional to 206,396.25 and 421,540.50

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Solution

The third proportional to 206,396.25 and 421,540.50 is: 860,947.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,396.25 : 421,540.50 = 421,540.50 : x
  2. Step 2: Convert to fraction form
    206,396.25/421,540.50 = 421,540.50/x
  3. Step 3: Cross multiply
    206,396.25x = 421,540.50 × 421,540.50
  4. Step 4: Simplify right side
    206,396.25x = 177,696,393,140.25
  5. Step 5: Solve for x
    x = 177,696,393,140.25/206,396.25
  6. Step 6: Final answer
    x = 860,947.78

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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.