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Finding the Fourth Proportional to 3,786.68, 5,681.18 and 1,939.09

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Solution

The fourth proportional to 3,786.68, 5,681.18 and 1,939.09 is: 2,909.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.68 : 5,681.18 = 1,939.09 : x
  2. Step 2: Convert to fraction form
    3,786.68/5,681.18 = 1,939.09/x
  3. Step 3: Cross multiply
    3,786.68x = 5,681.18 × 1,939.09
  4. Step 4: Simplify right side
    3,786.68x = 11,016,319.33
  5. Step 5: Solve for x
    x = 11,016,319.33/3,786.68
  6. Step 6: Final answer
    x = 2,909.23

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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.