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Finding the Third Proportional to 485,638 and 990,554

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Solution

The third proportional to 485,638 and 990,554 is: 2,020,429.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,638 : 990,554 = 990,554 : x
  2. Step 2: Convert to fraction form
    485,638/990,554 = 990,554/x
  3. Step 3: Cross multiply
    485,638x = 990,554 × 990,554
  4. Step 4: Simplify right side
    485,638x = 981,197,226,916
  5. Step 5: Solve for x
    x = 981,197,226,916/485,638
  6. Step 6: Final answer
    x = 2,020,429.26

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.