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Finding the Fourth Proportional to 1,998.57, 2,757.90 and 1,252.50

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Solution

The fourth proportional to 1,998.57, 2,757.90 and 1,252.50 is: 1,728.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.57 : 2,757.90 = 1,252.50 : x
  2. Step 2: Convert to fraction form
    1,998.57/2,757.90 = 1,252.50/x
  3. Step 3: Cross multiply
    1,998.57x = 2,757.90 × 1,252.50
  4. Step 4: Simplify right side
    1,998.57x = 3,454,269.75
  5. Step 5: Solve for x
    x = 3,454,269.75/1,998.57
  6. Step 6: Final answer
    x = 1,728.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.