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Finding the Third Proportional to 3,879 and 5,258.25

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Solution

The third proportional to 3,879 and 5,258.25 is: 7,127.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879 : 5,258.25 = 5,258.25 : x
  2. Step 2: Convert to fraction form
    3,879/5,258.25 = 5,258.25/x
  3. Step 3: Cross multiply
    3,879x = 5,258.25 × 5,258.25
  4. Step 4: Simplify right side
    3,879x = 27,649,193.06
  5. Step 5: Solve for x
    x = 27,649,193.06/3,879
  6. Step 6: Final answer
    x = 7,127.92

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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.