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Finding the Fourth Proportional to 321.92, 443.94 and 216.98

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Solution

The fourth proportional to 321.92, 443.94 and 216.98 is: 299.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.92 : 443.94 = 216.98 : x
  2. Step 2: Convert to fraction form
    321.92/443.94 = 216.98/x
  3. Step 3: Cross multiply
    321.92x = 443.94 × 216.98
  4. Step 4: Simplify right side
    321.92x = 96,326.10
  5. Step 5: Solve for x
    x = 96,326.10/321.92
  6. Step 6: Final answer
    x = 299.22

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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.