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Finding the Fourth Proportional to 3,940.12, 5,910.18 and 3,769.30

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Solution

The fourth proportional to 3,940.12, 5,910.18 and 3,769.30 is: 5,653.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.12 : 5,910.18 = 3,769.30 : x
  2. Step 2: Convert to fraction form
    3,940.12/5,910.18 = 3,769.30/x
  3. Step 3: Cross multiply
    3,940.12x = 5,910.18 × 3,769.30
  4. Step 4: Simplify right side
    3,940.12x = 22,277,241.47
  5. Step 5: Solve for x
    x = 22,277,241.47/3,940.12
  6. Step 6: Final answer
    x = 5,653.95

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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.