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Finding the Third Proportional to 321,255 and 699,691.50

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Solution

The third proportional to 321,255 and 699,691.50 is: 1,523,923.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,255 : 699,691.50 = 699,691.50 : x
  2. Step 2: Convert to fraction form
    321,255/699,691.50 = 699,691.50/x
  3. Step 3: Cross multiply
    321,255x = 699,691.50 × 699,691.50
  4. Step 4: Simplify right side
    321,255x = 489,568,195,172.25
  5. Step 5: Solve for x
    x = 489,568,195,172.25/321,255
  6. Step 6: Final answer
    x = 1,523,923.97

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.