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Finding the Fourth Proportional to 1,286.84, 1,773.97 and 843.97

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Solution

The fourth proportional to 1,286.84, 1,773.97 and 843.97 is: 1,163.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.84 : 1,773.97 = 843.97 : x
  2. Step 2: Convert to fraction form
    1,286.84/1,773.97 = 843.97/x
  3. Step 3: Cross multiply
    1,286.84x = 1,773.97 × 843.97
  4. Step 4: Simplify right side
    1,286.84x = 1,497,177.46
  5. Step 5: Solve for x
    x = 1,497,177.46/1,286.84
  6. Step 6: Final answer
    x = 1,163.45

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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.