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Finding the Third Proportional to 912 and 2,188

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Solution

The third proportional to 912 and 2,188 is: 5,249.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    912 : 2,188 = 2,188 : x
  2. Step 2: Convert to fraction form
    912/2,188 = 2,188/x
  3. Step 3: Cross multiply
    912x = 2,188 × 2,188
  4. Step 4: Simplify right side
    912x = 4,787,344
  5. Step 5: Solve for x
    x = 4,787,344/912
  6. Step 6: Final answer
    x = 5,249.28

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Why These Related Problems?

These problems maintain the same ratio (2.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.