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Finding the Third Proportional to 90,490 and 198,825

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Solution

The third proportional to 90,490 and 198,825 is: 436,859.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,490 : 198,825 = 198,825 : x
  2. Step 2: Convert to fraction form
    90,490/198,825 = 198,825/x
  3. Step 3: Cross multiply
    90,490x = 198,825 × 198,825
  4. Step 4: Simplify right side
    90,490x = 39,531,380,625
  5. Step 5: Solve for x
    x = 39,531,380,625/90,490
  6. Step 6: Final answer
    x = 436,859.11

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.