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Finding the Third Proportional to 3,321 and 7,287

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Solution

The third proportional to 3,321 and 7,287 is: 15,989.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,321 : 7,287 = 7,287 : x
  2. Step 2: Convert to fraction form
    3,321/7,287 = 7,287/x
  3. Step 3: Cross multiply
    3,321x = 7,287 × 7,287
  4. Step 4: Simplify right side
    3,321x = 53,100,369
  5. Step 5: Solve for x
    x = 53,100,369/3,321
  6. Step 6: Final answer
    x = 15,989.27

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.