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Finding the Third Proportional to 988 and 2,107

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Solution

The third proportional to 988 and 2,107 is: 4,493.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    988 : 2,107 = 2,107 : x
  2. Step 2: Convert to fraction form
    988/2,107 = 2,107/x
  3. Step 3: Cross multiply
    988x = 2,107 × 2,107
  4. Step 4: Simplify right side
    988x = 4,439,449
  5. Step 5: Solve for x
    x = 4,439,449/988
  6. Step 6: Final answer
    x = 4,493.37

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.