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Finding the Third Proportional to 4,381 and 6,788

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Solution

The third proportional to 4,381 and 6,788 is: 10,517.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,381 : 6,788 = 6,788 : x
  2. Step 2: Convert to fraction form
    4,381/6,788 = 6,788/x
  3. Step 3: Cross multiply
    4,381x = 6,788 × 6,788
  4. Step 4: Simplify right side
    4,381x = 46,076,944
  5. Step 5: Solve for x
    x = 46,076,944/4,381
  6. Step 6: Final answer
    x = 10,517.45

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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.