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Finding the Fourth Proportional to 294.49, 406.39 and 161.71

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Solution

The fourth proportional to 294.49, 406.39 and 161.71 is: 223.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.49 : 406.39 = 161.71 : x
  2. Step 2: Convert to fraction form
    294.49/406.39 = 161.71/x
  3. Step 3: Cross multiply
    294.49x = 406.39 × 161.71
  4. Step 4: Simplify right side
    294.49x = 65,717.33
  5. Step 5: Solve for x
    x = 65,717.33/294.49
  6. Step 6: Final answer
    x = 223.16

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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.