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Finding the Fourth Proportional to 2,991.45, 4,481.10 and 1,891.92

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Solution

The fourth proportional to 2,991.45, 4,481.10 and 1,891.92 is: 2,834.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.45 : 4,481.10 = 1,891.92 : x
  2. Step 2: Convert to fraction form
    2,991.45/4,481.10 = 1,891.92/x
  3. Step 3: Cross multiply
    2,991.45x = 4,481.10 × 1,891.92
  4. Step 4: Simplify right side
    2,991.45x = 8,477,882.71
  5. Step 5: Solve for x
    x = 8,477,882.71/2,991.45
  6. Step 6: Final answer
    x = 2,834.04

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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.