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Finding the Third Proportional to 4,909.36 and 6,979.61

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Solution

The third proportional to 4,909.36 and 6,979.61 is: 9,922.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,909.36 : 6,979.61 = 6,979.61 : x
  2. Step 2: Convert to fraction form
    4,909.36/6,979.61 = 6,979.61/x
  3. Step 3: Cross multiply
    4,909.36x = 6,979.61 × 6,979.61
  4. Step 4: Simplify right side
    4,909.36x = 48,714,892.50
  5. Step 5: Solve for x
    x = 48,714,892.50/4,909.36
  6. Step 6: Final answer
    x = 9,922.86

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.