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Finding the Fourth Proportional to 174.78, 262.26 and 161.42

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Solution

The fourth proportional to 174.78, 262.26 and 161.42 is: 242.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.78 : 262.26 = 161.42 : x
  2. Step 2: Convert to fraction form
    174.78/262.26 = 161.42/x
  3. Step 3: Cross multiply
    174.78x = 262.26 × 161.42
  4. Step 4: Simplify right side
    174.78x = 42,332.70
  5. Step 5: Solve for x
    x = 42,332.70/174.78
  6. Step 6: Final answer
    x = 242.21

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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.