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Finding the Third Proportional to 3,979.75 and 6,404.75

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Solution

The third proportional to 3,979.75 and 6,404.75 is: 10,307.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.75 : 6,404.75 = 6,404.75 : x
  2. Step 2: Convert to fraction form
    3,979.75/6,404.75 = 6,404.75/x
  3. Step 3: Cross multiply
    3,979.75x = 6,404.75 × 6,404.75
  4. Step 4: Simplify right side
    3,979.75x = 41,020,822.56
  5. Step 5: Solve for x
    x = 41,020,822.56/3,979.75
  6. Step 6: Final answer
    x = 10,307.39

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.