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Finding the Fourth Proportional to 267.72, 369.39 and 157.15

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Solution

The fourth proportional to 267.72, 369.39 and 157.15 is: 216.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.72 : 369.39 = 157.15 : x
  2. Step 2: Convert to fraction form
    267.72/369.39 = 157.15/x
  3. Step 3: Cross multiply
    267.72x = 369.39 × 157.15
  4. Step 4: Simplify right side
    267.72x = 58,049.64
  5. Step 5: Solve for x
    x = 58,049.64/267.72
  6. Step 6: Final answer
    x = 216.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.