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Finding the Fourth Proportional to 3,786.87, 5,681.03 and 1,190.55

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Solution

The fourth proportional to 3,786.87, 5,681.03 and 1,190.55 is: 1,786.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.87 : 5,681.03 = 1,190.55 : x
  2. Step 2: Convert to fraction form
    3,786.87/5,681.03 = 1,190.55/x
  3. Step 3: Cross multiply
    3,786.87x = 5,681.03 × 1,190.55
  4. Step 4: Simplify right side
    3,786.87x = 6,763,544.31
  5. Step 5: Solve for x
    x = 6,763,544.31/3,786.87
  6. Step 6: Final answer
    x = 1,786.05

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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.