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Finding the Fourth Proportional to 796.20, 1,194.30 and 211.20

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Solution

The fourth proportional to 796.20, 1,194.30 and 211.20 is: 316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.20 : 1,194.30 = 211.20 : x
  2. Step 2: Convert to fraction form
    796.20/1,194.30 = 211.20/x
  3. Step 3: Cross multiply
    796.20x = 1,194.30 × 211.20
  4. Step 4: Simplify right side
    796.20x = 252,236.16
  5. Step 5: Solve for x
    x = 252,236.16/796.20
  6. Step 6: Final answer
    x = 316.80

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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.