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Finding the Fourth Proportional to 422.04, 632.75 and 213.84

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Solution

The fourth proportional to 422.04, 632.75 and 213.84 is: 320.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.04 : 632.75 = 213.84 : x
  2. Step 2: Convert to fraction form
    422.04/632.75 = 213.84/x
  3. Step 3: Cross multiply
    422.04x = 632.75 × 213.84
  4. Step 4: Simplify right side
    422.04x = 135,306.19
  5. Step 5: Solve for x
    x = 135,306.19/422.04
  6. Step 6: Final answer
    x = 320.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.