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Finding the Fourth Proportional to 3,145.41, 4,717.80 and 1,912.41

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Solution

The fourth proportional to 3,145.41, 4,717.80 and 1,912.41 is: 2,868.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.41 : 4,717.80 = 1,912.41 : x
  2. Step 2: Convert to fraction form
    3,145.41/4,717.80 = 1,912.41/x
  3. Step 3: Cross multiply
    3,145.41x = 4,717.80 × 1,912.41
  4. Step 4: Simplify right side
    3,145.41x = 9,022,367.90
  5. Step 5: Solve for x
    x = 9,022,367.90/3,145.41
  6. Step 6: Final answer
    x = 2,868.42

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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.