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Finding the Third Proportional to 3,438 and 4,687

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Solution

The third proportional to 3,438 and 4,687 is: 6,389.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438 : 4,687 = 4,687 : x
  2. Step 2: Convert to fraction form
    3,438/4,687 = 4,687/x
  3. Step 3: Cross multiply
    3,438x = 4,687 × 4,687
  4. Step 4: Simplify right side
    3,438x = 21,967,969
  5. Step 5: Solve for x
    x = 21,967,969/3,438
  6. Step 6: Final answer
    x = 6,389.75

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.