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Finding the Third Proportional to 275,497.88 and 421,402.50

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Solution

The third proportional to 275,497.88 and 421,402.50 is: 644,578.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,497.88 : 421,402.50 = 421,402.50 : x
  2. Step 2: Convert to fraction form
    275,497.88/421,402.50 = 421,402.50/x
  3. Step 3: Cross multiply
    275,497.88x = 421,402.50 × 421,402.50
  4. Step 4: Simplify right side
    275,497.88x = 177,580,067,006.25
  5. Step 5: Solve for x
    x = 177,580,067,006.25/275,497.88
  6. Step 6: Final answer
    x = 644,578.72

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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.