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Finding the Third Proportional to 4,009 and 5,979

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Solution

The third proportional to 4,009 and 5,979 is: 8,917.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,009 : 5,979 = 5,979 : x
  2. Step 2: Convert to fraction form
    4,009/5,979 = 5,979/x
  3. Step 3: Cross multiply
    4,009x = 5,979 × 5,979
  4. Step 4: Simplify right side
    4,009x = 35,748,441
  5. Step 5: Solve for x
    x = 35,748,441/4,009
  6. Step 6: Final answer
    x = 8,917.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.