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Finding the Third Proportional to 686,658 and 1,491,531

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Solution

The third proportional to 686,658 and 1,491,531 is: 3,239,843.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,658 : 1,491,531 = 1,491,531 : x
  2. Step 2: Convert to fraction form
    686,658/1,491,531 = 1,491,531/x
  3. Step 3: Cross multiply
    686,658x = 1,491,531 × 1,491,531
  4. Step 4: Simplify right side
    686,658x = 2,224,664,723,961
  5. Step 5: Solve for x
    x = 2,224,664,723,961/686,658
  6. Step 6: Final answer
    x = 3,239,843.89

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.