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Finding the Fourth Proportional to 267.37, 401.21 and 105.17

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Solution

The fourth proportional to 267.37, 401.21 and 105.17 is: 157.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.37 : 401.21 = 105.17 : x
  2. Step 2: Convert to fraction form
    267.37/401.21 = 105.17/x
  3. Step 3: Cross multiply
    267.37x = 401.21 × 105.17
  4. Step 4: Simplify right side
    267.37x = 42,192.72
  5. Step 5: Solve for x
    x = 42,192.72/267.37
  6. Step 6: Final answer
    x = 157.81

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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.