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Finding the Fourth Proportional to 3,999.94, 5,519.93 and 2,231.55

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Solution

The fourth proportional to 3,999.94, 5,519.93 and 2,231.55 is: 3,079.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.94 : 5,519.93 = 2,231.55 : x
  2. Step 2: Convert to fraction form
    3,999.94/5,519.93 = 2,231.55/x
  3. Step 3: Cross multiply
    3,999.94x = 5,519.93 × 2,231.55
  4. Step 4: Simplify right side
    3,999.94x = 12,317,983.46
  5. Step 5: Solve for x
    x = 12,317,983.46/3,999.94
  6. Step 6: Final answer
    x = 3,079.54

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1.5x scale

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.