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Finding the Third Proportional to 212,287.50 and 321,169.50

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Solution

The third proportional to 212,287.50 and 321,169.50 is: 485,896.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,287.50 : 321,169.50 = 321,169.50 : x
  2. Step 2: Convert to fraction form
    212,287.50/321,169.50 = 321,169.50/x
  3. Step 3: Cross multiply
    212,287.50x = 321,169.50 × 321,169.50
  4. Step 4: Simplify right side
    212,287.50x = 103,149,847,730.25
  5. Step 5: Solve for x
    x = 103,149,847,730.25/212,287.50
  6. Step 6: Final answer
    x = 485,896.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.