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Finding the Third Proportional to 91,779 and 198,246

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Solution

The third proportional to 91,779 and 198,246 is: 428,218.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,779 : 198,246 = 198,246 : x
  2. Step 2: Convert to fraction form
    91,779/198,246 = 198,246/x
  3. Step 3: Cross multiply
    91,779x = 198,246 × 198,246
  4. Step 4: Simplify right side
    91,779x = 39,301,476,516
  5. Step 5: Solve for x
    x = 39,301,476,516/91,779
  6. Step 6: Final answer
    x = 428,218.62

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.