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Finding the Third Proportional to 323,763 and 686,979

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Solution

The third proportional to 323,763 and 686,979 is: 1,457,671.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,763 : 686,979 = 686,979 : x
  2. Step 2: Convert to fraction form
    323,763/686,979 = 686,979/x
  3. Step 3: Cross multiply
    323,763x = 686,979 × 686,979
  4. Step 4: Simplify right side
    323,763x = 471,940,146,441
  5. Step 5: Solve for x
    x = 471,940,146,441/323,763
  6. Step 6: Final answer
    x = 1,457,671.65

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.