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Finding the Fourth Proportional to 3,785.66, 5,681.40 and 1,936.62

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Solution

The fourth proportional to 3,785.66, 5,681.40 and 1,936.62 is: 2,906.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,785.66 : 5,681.40 = 1,936.62 : x
  2. Step 2: Convert to fraction form
    3,785.66/5,681.40 = 1,936.62/x
  3. Step 3: Cross multiply
    3,785.66x = 5,681.40 × 1,936.62
  4. Step 4: Simplify right side
    3,785.66x = 11,002,705.61
  5. Step 5: Solve for x
    x = 11,002,705.61/3,785.66
  6. Step 6: Final answer
    x = 2,906.42

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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.