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Finding the Fourth Proportional to 1,991.82, 2,747.19 and 1,767.99

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Solution

The fourth proportional to 1,991.82, 2,747.19 and 1,767.99 is: 2,438.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.82 : 2,747.19 = 1,767.99 : x
  2. Step 2: Convert to fraction form
    1,991.82/2,747.19 = 1,767.99/x
  3. Step 3: Cross multiply
    1,991.82x = 2,747.19 × 1,767.99
  4. Step 4: Simplify right side
    1,991.82x = 4,857,004.45
  5. Step 5: Solve for x
    x = 4,857,004.45/1,991.82
  6. Step 6: Final answer
    x = 2,438.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.