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Finding the Fourth Proportional to 322.16, 444.28 and 217.24

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Solution

The fourth proportional to 322.16, 444.28 and 217.24 is: 299.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.16 : 444.28 = 217.24 : x
  2. Step 2: Convert to fraction form
    322.16/444.28 = 217.24/x
  3. Step 3: Cross multiply
    322.16x = 444.28 × 217.24
  4. Step 4: Simplify right side
    322.16x = 96,515.39
  5. Step 5: Solve for x
    x = 96,515.39/322.16
  6. Step 6: Final answer
    x = 299.59

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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.