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Finding the Third Proportional to 321,164 and 667,816

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Solution

The third proportional to 321,164 and 667,816 is: 1,388,630.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,164 : 667,816 = 667,816 : x
  2. Step 2: Convert to fraction form
    321,164/667,816 = 667,816/x
  3. Step 3: Cross multiply
    321,164x = 667,816 × 667,816
  4. Step 4: Simplify right side
    321,164x = 445,978,209,856
  5. Step 5: Solve for x
    x = 445,978,209,856/321,164
  6. Step 6: Final answer
    x = 1,388,630.76

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.