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Finding the Fourth Proportional to 1,099.10, 1,647.60 and 550.73

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Solution

The fourth proportional to 1,099.10, 1,647.60 and 550.73 is: 825.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.10 : 1,647.60 = 550.73 : x
  2. Step 2: Convert to fraction form
    1,099.10/1,647.60 = 550.73/x
  3. Step 3: Cross multiply
    1,099.10x = 1,647.60 × 550.73
  4. Step 4: Simplify right side
    1,099.10x = 907,382.75
  5. Step 5: Solve for x
    x = 907,382.75/1,099.10
  6. Step 6: Final answer
    x = 825.57

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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.