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Finding the Fourth Proportional to 323.49, 446.20 and 212.85

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Solution

The fourth proportional to 323.49, 446.20 and 212.85 is: 293.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.49 : 446.20 = 212.85 : x
  2. Step 2: Convert to fraction form
    323.49/446.20 = 212.85/x
  3. Step 3: Cross multiply
    323.49x = 446.20 × 212.85
  4. Step 4: Simplify right side
    323.49x = 94,973.67
  5. Step 5: Solve for x
    x = 94,973.67/323.49
  6. Step 6: Final answer
    x = 293.59

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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.