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Finding the Third Proportional to 3,486.80 and 5,412.45

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Solution

The third proportional to 3,486.80 and 5,412.45 is: 8,401.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.80 : 5,412.45 = 5,412.45 : x
  2. Step 2: Convert to fraction form
    3,486.80/5,412.45 = 5,412.45/x
  3. Step 3: Cross multiply
    3,486.80x = 5,412.45 × 5,412.45
  4. Step 4: Simplify right side
    3,486.80x = 29,294,564.26
  5. Step 5: Solve for x
    x = 29,294,564.26/3,486.80
  6. Step 6: Final answer
    x = 8,401.57

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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.