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Finding the Third Proportional to 211,757.50 and 318,109

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Solution

The third proportional to 211,757.50 and 318,109 is: 477,873.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,757.50 : 318,109 = 318,109 : x
  2. Step 2: Convert to fraction form
    211,757.50/318,109 = 318,109/x
  3. Step 3: Cross multiply
    211,757.50x = 318,109 × 318,109
  4. Step 4: Simplify right side
    211,757.50x = 101,193,335,881
  5. Step 5: Solve for x
    x = 101,193,335,881/211,757.50
  6. Step 6: Final answer
    x = 477,873.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.