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Finding the Fourth Proportional to 1,821.11, 2,731.69 and 998.94

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Solution

The fourth proportional to 1,821.11, 2,731.69 and 998.94 is: 1,498.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.11 : 2,731.69 = 998.94 : x
  2. Step 2: Convert to fraction form
    1,821.11/2,731.69 = 998.94/x
  3. Step 3: Cross multiply
    1,821.11x = 2,731.69 × 998.94
  4. Step 4: Simplify right side
    1,821.11x = 2,728,782.48
  5. Step 5: Solve for x
    x = 2,728,782.48/1,821.11
  6. Step 6: Final answer
    x = 1,498.42

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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.