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Finding the Fourth Proportional to 3,940.43, 5,904.26 and 1,855.49

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Solution

The fourth proportional to 3,940.43, 5,904.26 and 1,855.49 is: 2,780.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.43 : 5,904.26 = 1,855.49 : x
  2. Step 2: Convert to fraction form
    3,940.43/5,904.26 = 1,855.49/x
  3. Step 3: Cross multiply
    3,940.43x = 5,904.26 × 1,855.49
  4. Step 4: Simplify right side
    3,940.43x = 10,955,256.59
  5. Step 5: Solve for x
    x = 10,955,256.59/3,940.43
  6. Step 6: Final answer
    x = 2,780.22

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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.