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Finding the Fourth Proportional to 1,998.85, 2,993.92 and 1,648.25

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Solution

The fourth proportional to 1,998.85, 2,993.92 and 1,648.25 is: 2,468.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.85 : 2,993.92 = 1,648.25 : x
  2. Step 2: Convert to fraction form
    1,998.85/2,993.92 = 1,648.25/x
  3. Step 3: Cross multiply
    1,998.85x = 2,993.92 × 1,648.25
  4. Step 4: Simplify right side
    1,998.85x = 4,934,728.64
  5. Step 5: Solve for x
    x = 4,934,728.64/1,998.85
  6. Step 6: Final answer
    x = 2,468.78

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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.