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Finding the Fourth Proportional to 418.14, 576.94 and 331.06

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Solution

The fourth proportional to 418.14, 576.94 and 331.06 is: 456.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.14 : 576.94 = 331.06 : x
  2. Step 2: Convert to fraction form
    418.14/576.94 = 331.06/x
  3. Step 3: Cross multiply
    418.14x = 576.94 × 331.06
  4. Step 4: Simplify right side
    418.14x = 191,000.10
  5. Step 5: Solve for x
    x = 191,000.10/418.14
  6. Step 6: Final answer
    x = 456.79

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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.