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Finding the Third Proportional to 311,950 and 638,682

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Solution

The third proportional to 311,950 and 638,682 is: 1,307,628.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,950 : 638,682 = 638,682 : x
  2. Step 2: Convert to fraction form
    311,950/638,682 = 638,682/x
  3. Step 3: Cross multiply
    311,950x = 638,682 × 638,682
  4. Step 4: Simplify right side
    311,950x = 407,914,697,124
  5. Step 5: Solve for x
    x = 407,914,697,124/311,950
  6. Step 6: Final answer
    x = 1,307,628.46

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.