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Finding the Third Proportional to 3,290 and 3,902

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Solution

The third proportional to 3,290 and 3,902 is: 4,627.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,290 : 3,902 = 3,902 : x
  2. Step 2: Convert to fraction form
    3,290/3,902 = 3,902/x
  3. Step 3: Cross multiply
    3,290x = 3,902 × 3,902
  4. Step 4: Simplify right side
    3,290x = 15,225,604
  5. Step 5: Solve for x
    x = 15,225,604/3,290
  6. Step 6: Final answer
    x = 4,627.84

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Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.