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Finding the Third Proportional to 149,816 and 321,867

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Solution

The third proportional to 149,816 and 321,867 is: 691,504.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,816 : 321,867 = 321,867 : x
  2. Step 2: Convert to fraction form
    149,816/321,867 = 321,867/x
  3. Step 3: Cross multiply
    149,816x = 321,867 × 321,867
  4. Step 4: Simplify right side
    149,816x = 103,598,365,689
  5. Step 5: Solve for x
    x = 103,598,365,689/149,816
  6. Step 6: Final answer
    x = 691,504.02

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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.