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Finding the Fourth Proportional to 627.37, 865.66 and 361.78

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Solution

The fourth proportional to 627.37, 865.66 and 361.78 is: 499.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.37 : 865.66 = 361.78 : x
  2. Step 2: Convert to fraction form
    627.37/865.66 = 361.78/x
  3. Step 3: Cross multiply
    627.37x = 865.66 × 361.78
  4. Step 4: Simplify right side
    627.37x = 313,175.41
  5. Step 5: Solve for x
    x = 313,175.41/627.37
  6. Step 6: Final answer
    x = 499.19

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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.