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Finding the Fourth Proportional to 322.21, 444.16 and 197.64

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Solution

The fourth proportional to 322.21, 444.16 and 197.64 is: 272.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.21 : 444.16 = 197.64 : x
  2. Step 2: Convert to fraction form
    322.21/444.16 = 197.64/x
  3. Step 3: Cross multiply
    322.21x = 444.16 × 197.64
  4. Step 4: Simplify right side
    322.21x = 87,783.29
  5. Step 5: Solve for x
    x = 87,783.29/322.21
  6. Step 6: Final answer
    x = 272.44

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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.