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Finding the Fourth Proportional to 331.85, 457.79 and 213.79

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Solution

The fourth proportional to 331.85, 457.79 and 213.79 is: 294.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.85 : 457.79 = 213.79 : x
  2. Step 2: Convert to fraction form
    331.85/457.79 = 213.79/x
  3. Step 3: Cross multiply
    331.85x = 457.79 × 213.79
  4. Step 4: Simplify right side
    331.85x = 97,870.92
  5. Step 5: Solve for x
    x = 97,870.92/331.85
  6. Step 6: Final answer
    x = 294.93

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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.