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Finding the Fourth Proportional to 793.22, 1,189.86 and 299.57

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Solution

The fourth proportional to 793.22, 1,189.86 and 299.57 is: 449.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.22 : 1,189.86 = 299.57 : x
  2. Step 2: Convert to fraction form
    793.22/1,189.86 = 299.57/x
  3. Step 3: Cross multiply
    793.22x = 1,189.86 × 299.57
  4. Step 4: Simplify right side
    793.22x = 356,451.85
  5. Step 5: Solve for x
    x = 356,451.85/793.22
  6. Step 6: Final answer
    x = 449.37

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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.