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Finding the Fourth Proportional to 292.91, 404.20 and 161.91

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Solution

The fourth proportional to 292.91, 404.20 and 161.91 is: 223.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.91 : 404.20 = 161.91 : x
  2. Step 2: Convert to fraction form
    292.91/404.20 = 161.91/x
  3. Step 3: Cross multiply
    292.91x = 404.20 × 161.91
  4. Step 4: Simplify right side
    292.91x = 65,443.62
  5. Step 5: Solve for x
    x = 65,443.62/292.91
  6. Step 6: Final answer
    x = 223.43

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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.