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Finding the Fourth Proportional to 361.36, 499.02 and 287.44

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Solution

The fourth proportional to 361.36, 499.02 and 287.44 is: 396.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.36 : 499.02 = 287.44 : x
  2. Step 2: Convert to fraction form
    361.36/499.02 = 287.44/x
  3. Step 3: Cross multiply
    361.36x = 499.02 × 287.44
  4. Step 4: Simplify right side
    361.36x = 143,438.31
  5. Step 5: Solve for x
    x = 143,438.31/361.36
  6. Step 6: Final answer
    x = 396.94

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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.