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Finding the Fourth Proportional to 1,394.88, 2,089.74 and 998.75

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Solution

The fourth proportional to 1,394.88, 2,089.74 and 998.75 is: 1,496.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.88 : 2,089.74 = 998.75 : x
  2. Step 2: Convert to fraction form
    1,394.88/2,089.74 = 998.75/x
  3. Step 3: Cross multiply
    1,394.88x = 2,089.74 × 998.75
  4. Step 4: Simplify right side
    1,394.88x = 2,087,112.38
  5. Step 5: Solve for x
    x = 2,087,112.38/1,394.88
  6. Step 6: Final answer
    x = 1,496.27

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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.