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Finding the Fourth Proportional to 3,999.95, 5,519.94 and 2,231.63

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Solution

The fourth proportional to 3,999.95, 5,519.94 and 2,231.63 is: 3,079.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.95 : 5,519.94 = 2,231.63 : x
  2. Step 2: Convert to fraction form
    3,999.95/5,519.94 = 2,231.63/x
  3. Step 3: Cross multiply
    3,999.95x = 5,519.94 × 2,231.63
  4. Step 4: Simplify right side
    3,999.95x = 12,318,436.10
  5. Step 5: Solve for x
    x = 12,318,436.10/3,999.95
  6. Step 6: Final answer
    x = 3,079.65

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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.