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Finding the Fourth Proportional to 251.05, 346.28 and 163.71

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Solution

The fourth proportional to 251.05, 346.28 and 163.71 is: 225.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.05 : 346.28 = 163.71 : x
  2. Step 2: Convert to fraction form
    251.05/346.28 = 163.71/x
  3. Step 3: Cross multiply
    251.05x = 346.28 × 163.71
  4. Step 4: Simplify right side
    251.05x = 56,689.50
  5. Step 5: Solve for x
    x = 56,689.50/251.05
  6. Step 6: Final answer
    x = 225.81

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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.