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Finding the Third Proportional to 311,218 and 682,699

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Solution

The third proportional to 311,218 and 682,699 is: 1,497,593.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,218 : 682,699 = 682,699 : x
  2. Step 2: Convert to fraction form
    311,218/682,699 = 682,699/x
  3. Step 3: Cross multiply
    311,218x = 682,699 × 682,699
  4. Step 4: Simplify right side
    311,218x = 466,077,924,601
  5. Step 5: Solve for x
    x = 466,077,924,601/311,218
  6. Step 6: Final answer
    x = 1,497,593.08

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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.