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Finding the Fourth Proportional to 322.70, 445.18 and 212.04

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Solution

The fourth proportional to 322.70, 445.18 and 212.04 is: 292.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.70 : 445.18 = 212.04 : x
  2. Step 2: Convert to fraction form
    322.70/445.18 = 212.04/x
  3. Step 3: Cross multiply
    322.70x = 445.18 × 212.04
  4. Step 4: Simplify right side
    322.70x = 94,395.97
  5. Step 5: Solve for x
    x = 94,395.97/322.70
  6. Step 6: Final answer
    x = 292.52

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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.