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Finding the Third Proportional to 3,409.80 and 5,422.36

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Solution

The third proportional to 3,409.80 and 5,422.36 is: 8,622.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.80 : 5,422.36 = 5,422.36 : x
  2. Step 2: Convert to fraction form
    3,409.80/5,422.36 = 5,422.36/x
  3. Step 3: Cross multiply
    3,409.80x = 5,422.36 × 5,422.36
  4. Step 4: Simplify right side
    3,409.80x = 29,401,981.19
  5. Step 5: Solve for x
    x = 29,401,981.19/3,409.80
  6. Step 6: Final answer
    x = 8,622.78

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.