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Finding the Fourth Proportional to 3,991.91, 5,985.81 and 2,144.57

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Solution

The fourth proportional to 3,991.91, 5,985.81 and 2,144.57 is: 3,215.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.91 : 5,985.81 = 2,144.57 : x
  2. Step 2: Convert to fraction form
    3,991.91/5,985.81 = 2,144.57/x
  3. Step 3: Cross multiply
    3,991.91x = 5,985.81 × 2,144.57
  4. Step 4: Simplify right side
    3,991.91x = 12,836,988.55
  5. Step 5: Solve for x
    x = 12,836,988.55/3,991.91
  6. Step 6: Final answer
    x = 3,215.75

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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.