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Finding the Third Proportional to 90,782 and 198,790

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Solution

The third proportional to 90,782 and 198,790 is: 435,300.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,782 : 198,790 = 198,790 : x
  2. Step 2: Convert to fraction form
    90,782/198,790 = 198,790/x
  3. Step 3: Cross multiply
    90,782x = 198,790 × 198,790
  4. Step 4: Simplify right side
    90,782x = 39,517,464,100
  5. Step 5: Solve for x
    x = 39,517,464,100/90,782
  6. Step 6: Final answer
    x = 435,300.66

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.