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Finding the Fourth Proportional to 3,857.97, 5,786.93 and 936.26

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Solution

The fourth proportional to 3,857.97, 5,786.93 and 936.26 is: 1,404.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.97 : 5,786.93 = 936.26 : x
  2. Step 2: Convert to fraction form
    3,857.97/5,786.93 = 936.26/x
  3. Step 3: Cross multiply
    3,857.97x = 5,786.93 × 936.26
  4. Step 4: Simplify right side
    3,857.97x = 5,418,044.49
  5. Step 5: Solve for x
    x = 5,418,044.49/3,857.97
  6. Step 6: Final answer
    x = 1,404.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.