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Finding the Fourth Proportional to 664.65, 996.12 and 356.67

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Solution

The fourth proportional to 664.65, 996.12 and 356.67 is: 534.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.65 : 996.12 = 356.67 : x
  2. Step 2: Convert to fraction form
    664.65/996.12 = 356.67/x
  3. Step 3: Cross multiply
    664.65x = 996.12 × 356.67
  4. Step 4: Simplify right side
    664.65x = 355,286.12
  5. Step 5: Solve for x
    x = 355,286.12/664.65
  6. Step 6: Final answer
    x = 534.55

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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.