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Finding the Fourth Proportional to 3,940.56, 5,908.82 and 1,166.88

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Solution

The fourth proportional to 3,940.56, 5,908.82 and 1,166.88 is: 1,749.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.56 : 5,908.82 = 1,166.88 : x
  2. Step 2: Convert to fraction form
    3,940.56/5,908.82 = 1,166.88/x
  3. Step 3: Cross multiply
    3,940.56x = 5,908.82 × 1,166.88
  4. Step 4: Simplify right side
    3,940.56x = 6,894,900.21
  5. Step 5: Solve for x
    x = 6,894,900.21/3,940.56
  6. Step 6: Final answer
    x = 1,749.73

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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.