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Finding the Fourth Proportional to 794.05, 1,191.12 and 331.49

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Solution

The fourth proportional to 794.05, 1,191.12 and 331.49 is: 497.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.05 : 1,191.12 = 331.49 : x
  2. Step 2: Convert to fraction form
    794.05/1,191.12 = 331.49/x
  3. Step 3: Cross multiply
    794.05x = 1,191.12 × 331.49
  4. Step 4: Simplify right side
    794.05x = 394,836.76
  5. Step 5: Solve for x
    x = 394,836.76/794.05
  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.