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Finding the Fourth Proportional to 662.41, 993.71 and 217.54

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Solution

The fourth proportional to 662.41, 993.71 and 217.54 is: 326.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.41 : 993.71 = 217.54 : x
  2. Step 2: Convert to fraction form
    662.41/993.71 = 217.54/x
  3. Step 3: Cross multiply
    662.41x = 993.71 × 217.54
  4. Step 4: Simplify right side
    662.41x = 216,169.73
  5. Step 5: Solve for x
    x = 216,169.73/662.41
  6. Step 6: Final answer
    x = 326.34

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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.