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Finding the Fourth Proportional to 638.21, 956.48 and 267.59

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Solution

The fourth proportional to 638.21, 956.48 and 267.59 is: 401.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.21 : 956.48 = 267.59 : x
  2. Step 2: Convert to fraction form
    638.21/956.48 = 267.59/x
  3. Step 3: Cross multiply
    638.21x = 956.48 × 267.59
  4. Step 4: Simplify right side
    638.21x = 255,944.48
  5. Step 5: Solve for x
    x = 255,944.48/638.21
  6. Step 6: Final answer
    x = 401.04

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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.