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Finding the Third Proportional to 3,405 and 5,351.25

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Solution

The third proportional to 3,405 and 5,351.25 is: 8,409.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405 : 5,351.25 = 5,351.25 : x
  2. Step 2: Convert to fraction form
    3,405/5,351.25 = 5,351.25/x
  3. Step 3: Cross multiply
    3,405x = 5,351.25 × 5,351.25
  4. Step 4: Simplify right side
    3,405x = 28,635,876.56
  5. Step 5: Solve for x
    x = 28,635,876.56/3,405
  6. Step 6: Final answer
    x = 8,409.95

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.