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Finding the Fourth Proportional to 2,245.76, 3,371.84 and 1,940.80

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Solution

The fourth proportional to 2,245.76, 3,371.84 and 1,940.80 is: 2,913.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,245.76 : 3,371.84 = 1,940.80 : x
  2. Step 2: Convert to fraction form
    2,245.76/3,371.84 = 1,940.80/x
  3. Step 3: Cross multiply
    2,245.76x = 3,371.84 × 1,940.80
  4. Step 4: Simplify right side
    2,245.76x = 6,544,067.07
  5. Step 5: Solve for x
    x = 6,544,067.07/2,245.76
  6. Step 6: Final answer
    x = 2,913.97

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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.