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Finding the Fourth Proportional to 322.92, 445.26 and 212.34

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Solution

The fourth proportional to 322.92, 445.26 and 212.34 is: 292.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.92 : 445.26 = 212.34 : x
  2. Step 2: Convert to fraction form
    322.92/445.26 = 212.34/x
  3. Step 3: Cross multiply
    322.92x = 445.26 × 212.34
  4. Step 4: Simplify right side
    322.92x = 94,546.51
  5. Step 5: Solve for x
    x = 94,546.51/322.92
  6. Step 6: Final answer
    x = 292.79

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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.