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Finding the Fourth Proportional to 422.57, 633.76 and 203.13

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Solution

The fourth proportional to 422.57, 633.76 and 203.13 is: 304.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.57 : 633.76 = 203.13 : x
  2. Step 2: Convert to fraction form
    422.57/633.76 = 203.13/x
  3. Step 3: Cross multiply
    422.57x = 633.76 × 203.13
  4. Step 4: Simplify right side
    422.57x = 128,735.16
  5. Step 5: Solve for x
    x = 128,735.16/422.57
  6. Step 6: Final answer
    x = 304.65

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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.