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Finding the Fourth Proportional to 793.89, 1,189.49 and 774.77

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Solution

The fourth proportional to 793.89, 1,189.49 and 774.77 is: 1,160.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.89 : 1,189.49 = 774.77 : x
  2. Step 2: Convert to fraction form
    793.89/1,189.49 = 774.77/x
  3. Step 3: Cross multiply
    793.89x = 1,189.49 × 774.77
  4. Step 4: Simplify right side
    793.89x = 921,571.35
  5. Step 5: Solve for x
    x = 921,571.35/793.89
  6. Step 6: Final answer
    x = 1,160.83

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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.