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Finding the Third Proportional to 3,918.75 and 5,319.75

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Solution

The third proportional to 3,918.75 and 5,319.75 is: 7,221.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.75 : 5,319.75 = 5,319.75 : x
  2. Step 2: Convert to fraction form
    3,918.75/5,319.75 = 5,319.75/x
  3. Step 3: Cross multiply
    3,918.75x = 5,319.75 × 5,319.75
  4. Step 4: Simplify right side
    3,918.75x = 28,299,740.06
  5. Step 5: Solve for x
    x = 28,299,740.06/3,918.75
  6. Step 6: Final answer
    x = 7,221.62

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.