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Finding the Third Proportional to 311,810 and 681,940

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Solution

The third proportional to 311,810 and 681,940 is: 1,491,428.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,810 : 681,940 = 681,940 : x
  2. Step 2: Convert to fraction form
    311,810/681,940 = 681,940/x
  3. Step 3: Cross multiply
    311,810x = 681,940 × 681,940
  4. Step 4: Simplify right side
    311,810x = 465,042,163,600
  5. Step 5: Solve for x
    x = 465,042,163,600/311,810
  6. Step 6: Final answer
    x = 1,491,428.00

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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.