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Finding the Third Proportional to 4,979 and 7,709.25

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Solution

The third proportional to 4,979 and 7,709.25 is: 11,936.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979 : 7,709.25 = 7,709.25 : x
  2. Step 2: Convert to fraction form
    4,979/7,709.25 = 7,709.25/x
  3. Step 3: Cross multiply
    4,979x = 7,709.25 × 7,709.25
  4. Step 4: Simplify right side
    4,979x = 59,432,535.56
  5. Step 5: Solve for x
    x = 59,432,535.56/4,979
  6. Step 6: Final answer
    x = 11,936.64

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.