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Finding the Fourth Proportional to 664.72, 996.71 and 274.61

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Solution

The fourth proportional to 664.72, 996.71 and 274.61 is: 411.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.72 : 996.71 = 274.61 : x
  2. Step 2: Convert to fraction form
    664.72/996.71 = 274.61/x
  3. Step 3: Cross multiply
    664.72x = 996.71 × 274.61
  4. Step 4: Simplify right side
    664.72x = 273,700.18
  5. Step 5: Solve for x
    x = 273,700.18/664.72
  6. Step 6: Final answer
    x = 411.76

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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.