Home / 1,990.14-2,982.87-1,112.43

Finding the Fourth Proportional to 1,990.14, 2,982.87 and 1,112.43

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Solution

The fourth proportional to 1,990.14, 2,982.87 and 1,112.43 is: 1,667.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.14 : 2,982.87 = 1,112.43 : x
  2. Step 2: Convert to fraction form
    1,990.14/2,982.87 = 1,112.43/x
  3. Step 3: Cross multiply
    1,990.14x = 2,982.87 × 1,112.43
  4. Step 4: Simplify right side
    1,990.14x = 3,318,234.07
  5. Step 5: Solve for x
    x = 3,318,234.07/1,990.14
  6. Step 6: Final answer
    x = 1,667.34

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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.