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Finding the Fourth Proportional to 221.39, 303.90 and 201.95

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Solution

The fourth proportional to 221.39, 303.90 and 201.95 is: 277.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.39 : 303.90 = 201.95 : x
  2. Step 2: Convert to fraction form
    221.39/303.90 = 201.95/x
  3. Step 3: Cross multiply
    221.39x = 303.90 × 201.95
  4. Step 4: Simplify right side
    221.39x = 61,372.61
  5. Step 5: Solve for x
    x = 61,372.61/221.39
  6. Step 6: Final answer
    x = 277.21

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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.