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Finding the Third Proportional to 1,891 and 4,086.25

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Solution

The third proportional to 1,891 and 4,086.25 is: 8,829.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891 : 4,086.25 = 4,086.25 : x
  2. Step 2: Convert to fraction form
    1,891/4,086.25 = 4,086.25/x
  3. Step 3: Cross multiply
    1,891x = 4,086.25 × 4,086.25
  4. Step 4: Simplify right side
    1,891x = 16,697,439.06
  5. Step 5: Solve for x
    x = 16,697,439.06/1,891
  6. Step 6: Final answer
    x = 8,829.95

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.