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Finding the Fourth Proportional to 422.34, 633.14 and 205.80

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Solution

The fourth proportional to 422.34, 633.14 and 205.80 is: 308.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.34 : 633.14 = 205.80 : x
  2. Step 2: Convert to fraction form
    422.34/633.14 = 205.80/x
  3. Step 3: Cross multiply
    422.34x = 633.14 × 205.80
  4. Step 4: Simplify right side
    422.34x = 130,300.21
  5. Step 5: Solve for x
    x = 130,300.21/422.34
  6. Step 6: Final answer
    x = 308.52

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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.