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Finding the Fourth Proportional to 1,201.94, 1,800.58 and 789.83

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Solution

The fourth proportional to 1,201.94, 1,800.58 and 789.83 is: 1,183.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.94 : 1,800.58 = 789.83 : x
  2. Step 2: Convert to fraction form
    1,201.94/1,800.58 = 789.83/x
  3. Step 3: Cross multiply
    1,201.94x = 1,800.58 × 789.83
  4. Step 4: Simplify right side
    1,201.94x = 1,422,149.36
  5. Step 5: Solve for x
    x = 1,422,149.36/1,201.94
  6. Step 6: Final answer
    x = 1,183.21

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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.