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Finding the Fourth Proportional to 322.72, 444.78 and 224.24

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Solution

The fourth proportional to 322.72, 444.78 and 224.24 is: 309.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.72 : 444.78 = 224.24 : x
  2. Step 2: Convert to fraction form
    322.72/444.78 = 224.24/x
  3. Step 3: Cross multiply
    322.72x = 444.78 × 224.24
  4. Step 4: Simplify right side
    322.72x = 99,737.47
  5. Step 5: Solve for x
    x = 99,737.47/322.72
  6. Step 6: Final answer
    x = 309.05

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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.