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Finding the Fourth Proportional to 3,999.56, 5,518.86 and 2,230.88

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Solution

The fourth proportional to 3,999.56, 5,518.86 and 2,230.88 is: 3,078.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.56 : 5,518.86 = 2,230.88 : x
  2. Step 2: Convert to fraction form
    3,999.56/5,518.86 = 2,230.88/x
  3. Step 3: Cross multiply
    3,999.56x = 5,518.86 × 2,230.88
  4. Step 4: Simplify right side
    3,999.56x = 12,311,914.40
  5. Step 5: Solve for x
    x = 12,311,914.40/3,999.56
  6. Step 6: Final answer
    x = 3,078.32

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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.