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Finding the Third Proportional to 91,638 and 198,828

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Solution

The third proportional to 91,638 and 198,828 is: 431,399.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,638 : 198,828 = 198,828 : x
  2. Step 2: Convert to fraction form
    91,638/198,828 = 198,828/x
  3. Step 3: Cross multiply
    91,638x = 198,828 × 198,828
  4. Step 4: Simplify right side
    91,638x = 39,532,573,584
  5. Step 5: Solve for x
    x = 39,532,573,584/91,638
  6. Step 6: Final answer
    x = 431,399.35

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.