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Finding the Third Proportional to 3,988.75 and 5,709.75

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Solution

The third proportional to 3,988.75 and 5,709.75 is: 8,173.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.75 : 5,709.75 = 5,709.75 : x
  2. Step 2: Convert to fraction form
    3,988.75/5,709.75 = 5,709.75/x
  3. Step 3: Cross multiply
    3,988.75x = 5,709.75 × 5,709.75
  4. Step 4: Simplify right side
    3,988.75x = 32,601,245.06
  5. Step 5: Solve for x
    x = 32,601,245.06/3,988.75
  6. Step 6: Final answer
    x = 8,173.30

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.