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Finding the Fourth Proportional to 251.74, 347.39 and 163.22

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Solution

The fourth proportional to 251.74, 347.39 and 163.22 is: 225.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.74 : 347.39 = 163.22 : x
  2. Step 2: Convert to fraction form
    251.74/347.39 = 163.22/x
  3. Step 3: Cross multiply
    251.74x = 347.39 × 163.22
  4. Step 4: Simplify right side
    251.74x = 56,699.05
  5. Step 5: Solve for x
    x = 56,699.05/251.74
  6. Step 6: Final answer
    x = 225.23

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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.