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Finding the Fourth Proportional to 664.41, 996.84 and 253.56

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Solution

The fourth proportional to 664.41, 996.84 and 253.56 is: 380.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.41 : 996.84 = 253.56 : x
  2. Step 2: Convert to fraction form
    664.41/996.84 = 253.56/x
  3. Step 3: Cross multiply
    664.41x = 996.84 × 253.56
  4. Step 4: Simplify right side
    664.41x = 252,758.75
  5. Step 5: Solve for x
    x = 252,758.75/664.41
  6. Step 6: Final answer
    x = 380.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.