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Finding the Third Proportional to 1,289 and 3,114

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Solution

The third proportional to 1,289 and 3,114 is: 7,522.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289 : 3,114 = 3,114 : x
  2. Step 2: Convert to fraction form
    1,289/3,114 = 3,114/x
  3. Step 3: Cross multiply
    1,289x = 3,114 × 3,114
  4. Step 4: Simplify right side
    1,289x = 9,696,996
  5. Step 5: Solve for x
    x = 9,696,996/1,289
  6. Step 6: Final answer
    x = 7,522.88

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.