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Finding the Fourth Proportional to 793.82, 1,190.71 and 216.70

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Solution

The fourth proportional to 793.82, 1,190.71 and 216.70 is: 325.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.82 : 1,190.71 = 216.70 : x
  2. Step 2: Convert to fraction form
    793.82/1,190.71 = 216.70/x
  3. Step 3: Cross multiply
    793.82x = 1,190.71 × 216.70
  4. Step 4: Simplify right side
    793.82x = 258,026.86
  5. Step 5: Solve for x
    x = 258,026.86/793.82
  6. Step 6: Final answer
    x = 325.04

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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.