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Finding the Third Proportional to 1,969 and 4,287

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Solution

The third proportional to 1,969 and 4,287 is: 9,333.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969 : 4,287 = 4,287 : x
  2. Step 2: Convert to fraction form
    1,969/4,287 = 4,287/x
  3. Step 3: Cross multiply
    1,969x = 4,287 × 4,287
  4. Step 4: Simplify right side
    1,969x = 18,378,369
  5. Step 5: Solve for x
    x = 18,378,369/1,969
  6. Step 6: Final answer
    x = 9,333.86

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.