Home / 3,999.82-5,519.74-2,231.40

Finding the Fourth Proportional to 3,999.82, 5,519.74 and 2,231.40

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Solution

The fourth proportional to 3,999.82, 5,519.74 and 2,231.40 is: 3,079.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.82 : 5,519.74 = 2,231.40 : x
  2. Step 2: Convert to fraction form
    3,999.82/5,519.74 = 2,231.40/x
  3. Step 3: Cross multiply
    3,999.82x = 5,519.74 × 2,231.40
  4. Step 4: Simplify right side
    3,999.82x = 12,316,747.84
  5. Step 5: Solve for x
    x = 12,316,747.84/3,999.82
  6. Step 6: Final answer
    x = 3,079.33

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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.