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Finding the Fourth Proportional to 272.42, 375.91 and 161.87

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Solution

The fourth proportional to 272.42, 375.91 and 161.87 is: 223.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.42 : 375.91 = 161.87 : x
  2. Step 2: Convert to fraction form
    272.42/375.91 = 161.87/x
  3. Step 3: Cross multiply
    272.42x = 375.91 × 161.87
  4. Step 4: Simplify right side
    272.42x = 60,849.09
  5. Step 5: Solve for x
    x = 60,849.09/272.42
  6. Step 6: Final answer
    x = 223.37

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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.