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Finding the Fourth Proportional to 398.13, 597.20 and 154.61

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Solution

The fourth proportional to 398.13, 597.20 and 154.61 is: 231.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.13 : 597.20 = 154.61 : x
  2. Step 2: Convert to fraction form
    398.13/597.20 = 154.61/x
  3. Step 3: Cross multiply
    398.13x = 597.20 × 154.61
  4. Step 4: Simplify right side
    398.13x = 92,329.33
  5. Step 5: Solve for x
    x = 92,329.33/398.13
  6. Step 6: Final answer
    x = 231.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.