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Finding the Fourth Proportional to 361.38, 498.90 and 274.44

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Solution

The fourth proportional to 361.38, 498.90 and 274.44 is: 378.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.38 : 498.90 = 274.44 : x
  2. Step 2: Convert to fraction form
    361.38/498.90 = 274.44/x
  3. Step 3: Cross multiply
    361.38x = 498.90 × 274.44
  4. Step 4: Simplify right side
    361.38x = 136,918.12
  5. Step 5: Solve for x
    x = 136,918.12/361.38
  6. Step 6: Final answer
    x = 378.88

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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.