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Finding the Fourth Proportional to 251.21, 346.74 and 163.91

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Solution

The fourth proportional to 251.21, 346.74 and 163.91 is: 226.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.21 : 346.74 = 163.91 : x
  2. Step 2: Convert to fraction form
    251.21/346.74 = 163.91/x
  3. Step 3: Cross multiply
    251.21x = 346.74 × 163.91
  4. Step 4: Simplify right side
    251.21x = 56,834.15
  5. Step 5: Solve for x
    x = 56,834.15/251.21
  6. Step 6: Final answer
    x = 226.24

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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.