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Finding the Fourth Proportional to 1,863.89, 2,796.45 and 998

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Solution

The fourth proportional to 1,863.89, 2,796.45 and 998 is: 1,497.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.89 : 2,796.45 = 998 : x
  2. Step 2: Convert to fraction form
    1,863.89/2,796.45 = 998/x
  3. Step 3: Cross multiply
    1,863.89x = 2,796.45 × 998
  4. Step 4: Simplify right side
    1,863.89x = 2,790,852.11
  5. Step 5: Solve for x
    x = 2,790,852.11/1,863.89
  6. Step 6: Final answer
    x = 1,497.33

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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.