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Finding the Third Proportional to 3,390 and 4,377

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Solution

The third proportional to 3,390 and 4,377 is: 5,651.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390 : 4,377 = 4,377 : x
  2. Step 2: Convert to fraction form
    3,390/4,377 = 4,377/x
  3. Step 3: Cross multiply
    3,390x = 4,377 × 4,377
  4. Step 4: Simplify right side
    3,390x = 19,158,129
  5. Step 5: Solve for x
    x = 19,158,129/3,390
  6. Step 6: Final answer
    x = 5,651.37

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.