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Finding the Third Proportional to 2,187.75 and 2,911.88

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Solution

The third proportional to 2,187.75 and 2,911.88 is: 3,875.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.75 : 2,911.88 = 2,911.88 : x
  2. Step 2: Convert to fraction form
    2,187.75/2,911.88 = 2,911.88/x
  3. Step 3: Cross multiply
    2,187.75x = 2,911.88 × 2,911.88
  4. Step 4: Simplify right side
    2,187.75x = 8,479,016.02
  5. Step 5: Solve for x
    x = 8,479,016.02/2,187.75
  6. Step 6: Final answer
    x = 3,875.68

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.