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Finding the Fourth Proportional to 793.69, 1,190.74 and 331.32

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Solution

The fourth proportional to 793.69, 1,190.74 and 331.32 is: 497.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.69 : 1,190.74 = 331.32 : x
  2. Step 2: Convert to fraction form
    793.69/1,190.74 = 331.32/x
  3. Step 3: Cross multiply
    793.69x = 1,190.74 × 331.32
  4. Step 4: Simplify right side
    793.69x = 394,515.98
  5. Step 5: Solve for x
    x = 394,515.98/793.69
  6. Step 6: Final answer
    x = 497.07

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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.