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Finding the Third Proportional to 3,909 and 5,230.50

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Solution

The third proportional to 3,909 and 5,230.50 is: 6,998.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909 : 5,230.50 = 5,230.50 : x
  2. Step 2: Convert to fraction form
    3,909/5,230.50 = 5,230.50/x
  3. Step 3: Cross multiply
    3,909x = 5,230.50 × 5,230.50
  4. Step 4: Simplify right side
    3,909x = 27,358,130.25
  5. Step 5: Solve for x
    x = 27,358,130.25/3,909
  6. Step 6: Final answer
    x = 6,998.75

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.