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Finding the Third Proportional to 686,282 and 990,053

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Solution

The third proportional to 686,282 and 990,053 is: 1,428,283.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,282 : 990,053 = 990,053 : x
  2. Step 2: Convert to fraction form
    686,282/990,053 = 990,053/x
  3. Step 3: Cross multiply
    686,282x = 990,053 × 990,053
  4. Step 4: Simplify right side
    686,282x = 980,204,942,809
  5. Step 5: Solve for x
    x = 980,204,942,809/686,282
  6. Step 6: Final answer
    x = 1,428,283.04

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.