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Finding the Fourth Proportional to 398.24, 549.33 and 272.42

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Solution

The fourth proportional to 398.24, 549.33 and 272.42 is: 375.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.24 : 549.33 = 272.42 : x
  2. Step 2: Convert to fraction form
    398.24/549.33 = 272.42/x
  3. Step 3: Cross multiply
    398.24x = 549.33 × 272.42
  4. Step 4: Simplify right side
    398.24x = 149,645.73
  5. Step 5: Solve for x
    x = 149,645.73/398.24
  6. Step 6: Final answer
    x = 375.77

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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.