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Finding the Fourth Proportional to 361.22, 498.45 and 213.82

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Solution

The fourth proportional to 361.22, 498.45 and 213.82 is: 295.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.22 : 498.45 = 213.82 : x
  2. Step 2: Convert to fraction form
    361.22/498.45 = 213.82/x
  3. Step 3: Cross multiply
    361.22x = 498.45 × 213.82
  4. Step 4: Simplify right side
    361.22x = 106,578.58
  5. Step 5: Solve for x
    x = 106,578.58/361.22
  6. Step 6: Final answer
    x = 295.05

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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.