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Finding the Fourth Proportional to 361.83, 499.29 and 221.97

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Solution

The fourth proportional to 361.83, 499.29 and 221.97 is: 306.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.83 : 499.29 = 221.97 : x
  2. Step 2: Convert to fraction form
    361.83/499.29 = 221.97/x
  3. Step 3: Cross multiply
    361.83x = 499.29 × 221.97
  4. Step 4: Simplify right side
    361.83x = 110,827.40
  5. Step 5: Solve for x
    x = 110,827.40/361.83
  6. Step 6: Final answer
    x = 306.30

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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.