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Finding the Third Proportional to 321,417.38 and 691,206.75

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Solution

The third proportional to 321,417.38 and 691,206.75 is: 1,486,437.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,417.38 : 691,206.75 = 691,206.75 : x
  2. Step 2: Convert to fraction form
    321,417.38/691,206.75 = 691,206.75/x
  3. Step 3: Cross multiply
    321,417.38x = 691,206.75 × 691,206.75
  4. Step 4: Simplify right side
    321,417.38x = 477,766,771,245.56
  5. Step 5: Solve for x
    x = 477,766,771,245.56/321,417.38
  6. Step 6: Final answer
    x = 1,486,437.29

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.