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Finding the Third Proportional to 3,118 and 4,879

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Solution

The third proportional to 3,118 and 4,879 is: 7,634.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118 : 4,879 = 4,879 : x
  2. Step 2: Convert to fraction form
    3,118/4,879 = 4,879/x
  3. Step 3: Cross multiply
    3,118x = 4,879 × 4,879
  4. Step 4: Simplify right side
    3,118x = 23,804,641
  5. Step 5: Solve for x
    x = 23,804,641/3,118
  6. Step 6: Final answer
    x = 7,634.59

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.