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Finding the Third Proportional to 3,390 and 3,822

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Solution

The third proportional to 3,390 and 3,822 is: 4,309.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390 : 3,822 = 3,822 : x
  2. Step 2: Convert to fraction form
    3,390/3,822 = 3,822/x
  3. Step 3: Cross multiply
    3,390x = 3,822 × 3,822
  4. Step 4: Simplify right side
    3,390x = 14,607,684
  5. Step 5: Solve for x
    x = 14,607,684/3,390
  6. Step 6: Final answer
    x = 4,309.05

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.