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Finding the Third Proportional to 3,407 and 5,161.25

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Solution

The third proportional to 3,407 and 5,161.25 is: 7,818.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,407 : 5,161.25 = 5,161.25 : x
  2. Step 2: Convert to fraction form
    3,407/5,161.25 = 5,161.25/x
  3. Step 3: Cross multiply
    3,407x = 5,161.25 × 5,161.25
  4. Step 4: Simplify right side
    3,407x = 26,638,501.56
  5. Step 5: Solve for x
    x = 26,638,501.56/3,407
  6. Step 6: Final answer
    x = 7,818.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.