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Finding the Fourth Proportional to 394.01, 543.28 and 331.74

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Solution

The fourth proportional to 394.01, 543.28 and 331.74 is: 457.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.01 : 543.28 = 331.74 : x
  2. Step 2: Convert to fraction form
    394.01/543.28 = 331.74/x
  3. Step 3: Cross multiply
    394.01x = 543.28 × 331.74
  4. Step 4: Simplify right side
    394.01x = 180,226.88
  5. Step 5: Solve for x
    x = 180,226.88/394.01
  6. Step 6: Final answer
    x = 457.42

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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.