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Finding the Third Proportional to 2,187 and 2,776.50

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Solution

The third proportional to 2,187 and 2,776.50 is: 3,524.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187 : 2,776.50 = 2,776.50 : x
  2. Step 2: Convert to fraction form
    2,187/2,776.50 = 2,776.50/x
  3. Step 3: Cross multiply
    2,187x = 2,776.50 × 2,776.50
  4. Step 4: Simplify right side
    2,187x = 7,708,952.25
  5. Step 5: Solve for x
    x = 7,708,952.25/2,187
  6. Step 6: Final answer
    x = 3,524.90

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.