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Finding the Third Proportional to 2,543 and 3,985.25

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Solution

The third proportional to 2,543 and 3,985.25 is: 6,245.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543 : 3,985.25 = 3,985.25 : x
  2. Step 2: Convert to fraction form
    2,543/3,985.25 = 3,985.25/x
  3. Step 3: Cross multiply
    2,543x = 3,985.25 × 3,985.25
  4. Step 4: Simplify right side
    2,543x = 15,882,217.56
  5. Step 5: Solve for x
    x = 15,882,217.56/2,543
  6. Step 6: Final answer
    x = 6,245.47

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.