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Finding the Fourth Proportional to 656.44, 905.90 and 361.73

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Solution

The fourth proportional to 656.44, 905.90 and 361.73 is: 499.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.44 : 905.90 = 361.73 : x
  2. Step 2: Convert to fraction form
    656.44/905.90 = 361.73/x
  3. Step 3: Cross multiply
    656.44x = 905.90 × 361.73
  4. Step 4: Simplify right side
    656.44x = 327,691.66
  5. Step 5: Solve for x
    x = 327,691.66/656.44
  6. Step 6: Final answer
    x = 499.20

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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.