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Finding the Fourth Proportional to 638.17, 956.13 and 267.16

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Solution

The fourth proportional to 638.17, 956.13 and 267.16 is: 400.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.17 : 956.13 = 267.16 : x
  2. Step 2: Convert to fraction form
    638.17/956.13 = 267.16/x
  3. Step 3: Cross multiply
    638.17x = 956.13 × 267.16
  4. Step 4: Simplify right side
    638.17x = 255,439.88
  5. Step 5: Solve for x
    x = 255,439.88/638.17
  6. Step 6: Final answer
    x = 400.27

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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.