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Finding the Third Proportional to 3,387.75 and 4,392.75

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Solution

The third proportional to 3,387.75 and 4,392.75 is: 5,695.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.75 : 4,392.75 = 4,392.75 : x
  2. Step 2: Convert to fraction form
    3,387.75/4,392.75 = 4,392.75/x
  3. Step 3: Cross multiply
    3,387.75x = 4,392.75 × 4,392.75
  4. Step 4: Simplify right side
    3,387.75x = 19,296,252.56
  5. Step 5: Solve for x
    x = 19,296,252.56/3,387.75
  6. Step 6: Final answer
    x = 5,695.89

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.