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Finding the Fourth Proportional to 277.17, 382.89 and 221.85

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Solution

The fourth proportional to 277.17, 382.89 and 221.85 is: 306.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.17 : 382.89 = 221.85 : x
  2. Step 2: Convert to fraction form
    277.17/382.89 = 221.85/x
  3. Step 3: Cross multiply
    277.17x = 382.89 × 221.85
  4. Step 4: Simplify right side
    277.17x = 84,944.15
  5. Step 5: Solve for x
    x = 84,944.15/277.17
  6. Step 6: Final answer
    x = 306.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.