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Finding the Fourth Proportional to 3,986.17, 5,979.25 and 3,289.84

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Solution

The fourth proportional to 3,986.17, 5,979.25 and 3,289.84 is: 4,934.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.17 : 5,979.25 = 3,289.84 : x
  2. Step 2: Convert to fraction form
    3,986.17/5,979.25 = 3,289.84/x
  3. Step 3: Cross multiply
    3,986.17x = 5,979.25 × 3,289.84
  4. Step 4: Simplify right side
    3,986.17x = 19,670,764.98
  5. Step 5: Solve for x
    x = 19,670,764.98/3,986.17
  6. Step 6: Final answer
    x = 4,934.76

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Similar ratio
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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.