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Finding the Fourth Proportional to 793.55, 1,189.68 and 331.68

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Solution

The fourth proportional to 793.55, 1,189.68 and 331.68 is: 497.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.55 : 1,189.68 = 331.68 : x
  2. Step 2: Convert to fraction form
    793.55/1,189.68 = 331.68/x
  3. Step 3: Cross multiply
    793.55x = 1,189.68 × 331.68
  4. Step 4: Simplify right side
    793.55x = 394,593.06
  5. Step 5: Solve for x
    x = 394,593.06/793.55
  6. Step 6: Final answer
    x = 497.25

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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.