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Finding the Fourth Proportional to 793.98, 1,191.42 and 355.08

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Solution

The fourth proportional to 793.98, 1,191.42 and 355.08 is: 532.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.98 : 1,191.42 = 355.08 : x
  2. Step 2: Convert to fraction form
    793.98/1,191.42 = 355.08/x
  3. Step 3: Cross multiply
    793.98x = 1,191.42 × 355.08
  4. Step 4: Simplify right side
    793.98x = 423,049.41
  5. Step 5: Solve for x
    x = 423,049.41/793.98
  6. Step 6: Final answer
    x = 532.82

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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.