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Finding the Third Proportional to 1,801 and 3,909.50

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Solution

The third proportional to 1,801 and 3,909.50 is: 8,486.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,801 : 3,909.50 = 3,909.50 : x
  2. Step 2: Convert to fraction form
    1,801/3,909.50 = 3,909.50/x
  3. Step 3: Cross multiply
    1,801x = 3,909.50 × 3,909.50
  4. Step 4: Simplify right side
    1,801x = 15,284,190.25
  5. Step 5: Solve for x
    x = 15,284,190.25/1,801
  6. Step 6: Final answer
    x = 8,486.50

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.