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Finding the Fourth Proportional to 221.12, 303.50 and 197.29

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Solution

The fourth proportional to 221.12, 303.50 and 197.29 is: 270.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.12 : 303.50 = 197.29 : x
  2. Step 2: Convert to fraction form
    221.12/303.50 = 197.29/x
  3. Step 3: Cross multiply
    221.12x = 303.50 × 197.29
  4. Step 4: Simplify right side
    221.12x = 59,877.52
  5. Step 5: Solve for x
    x = 59,877.52/221.12
  6. Step 6: Final answer
    x = 270.79

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.