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Finding the Third Proportional to 485,621 and 990,519

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Solution

The third proportional to 485,621 and 990,519 is: 2,020,357.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,621 : 990,519 = 990,519 : x
  2. Step 2: Convert to fraction form
    485,621/990,519 = 990,519/x
  3. Step 3: Cross multiply
    485,621x = 990,519 × 990,519
  4. Step 4: Simplify right side
    485,621x = 981,127,889,361
  5. Step 5: Solve for x
    x = 981,127,889,361/485,621
  6. Step 6: Final answer
    x = 2,020,357.21

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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.