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Finding the Fourth Proportional to 3,991.43, 5,979.84 and 2,893.07

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Solution

The fourth proportional to 3,991.43, 5,979.84 and 2,893.07 is: 4,334.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.43 : 5,979.84 = 2,893.07 : x
  2. Step 2: Convert to fraction form
    3,991.43/5,979.84 = 2,893.07/x
  3. Step 3: Cross multiply
    3,991.43x = 5,979.84 × 2,893.07
  4. Step 4: Simplify right side
    3,991.43x = 17,300,065.81
  5. Step 5: Solve for x
    x = 17,300,065.81/3,991.43
  6. Step 6: Final answer
    x = 4,334.31

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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.