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Finding the Fourth Proportional to 322.34, 445.23 and 217.62

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Solution

The fourth proportional to 322.34, 445.23 and 217.62 is: 300.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.34 : 445.23 = 217.62 : x
  2. Step 2: Convert to fraction form
    322.34/445.23 = 217.62/x
  3. Step 3: Cross multiply
    322.34x = 445.23 × 217.62
  4. Step 4: Simplify right side
    322.34x = 96,890.95
  5. Step 5: Solve for x
    x = 96,890.95/322.34
  6. Step 6: Final answer
    x = 300.59

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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.