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Finding the Third Proportional to 381,631.50 and 821,218.50

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Solution

The third proportional to 381,631.50 and 821,218.50 is: 1,767,149.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,631.50 : 821,218.50 = 821,218.50 : x
  2. Step 2: Convert to fraction form
    381,631.50/821,218.50 = 821,218.50/x
  3. Step 3: Cross multiply
    381,631.50x = 821,218.50 × 821,218.50
  4. Step 4: Simplify right side
    381,631.50x = 674,399,824,742.25
  5. Step 5: Solve for x
    x = 674,399,824,742.25/381,631.50
  6. Step 6: Final answer
    x = 1,767,149.27

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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.