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Finding the Third Proportional to 313,675 and 686,317

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Solution

The third proportional to 313,675 and 686,317 is: 1,501,653.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,675 : 686,317 = 686,317 : x
  2. Step 2: Convert to fraction form
    313,675/686,317 = 686,317/x
  3. Step 3: Cross multiply
    313,675x = 686,317 × 686,317
  4. Step 4: Simplify right side
    313,675x = 471,031,024,489
  5. Step 5: Solve for x
    x = 471,031,024,489/313,675
  6. Step 6: Final answer
    x = 1,501,653.06

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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.