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Finding the Fourth Proportional to 3,999.55, 5,991.28 and 1,992.19

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Solution

The fourth proportional to 3,999.55, 5,991.28 and 1,992.19 is: 2,984.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.55 : 5,991.28 = 1,992.19 : x
  2. Step 2: Convert to fraction form
    3,999.55/5,991.28 = 1,992.19/x
  3. Step 3: Cross multiply
    3,999.55x = 5,991.28 × 1,992.19
  4. Step 4: Simplify right side
    3,999.55x = 11,935,738.15
  5. Step 5: Solve for x
    x = 11,935,738.15/3,999.55
  6. Step 6: Final answer
    x = 2,984.27

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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.