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Finding the Fourth Proportional to 297.20, 409.92 and 180.80

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Solution

The fourth proportional to 297.20, 409.92 and 180.80 is: 249.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.20 : 409.92 = 180.80 : x
  2. Step 2: Convert to fraction form
    297.20/409.92 = 180.80/x
  3. Step 3: Cross multiply
    297.20x = 409.92 × 180.80
  4. Step 4: Simplify right side
    297.20x = 74,113.54
  5. Step 5: Solve for x
    x = 74,113.54/297.20
  6. Step 6: Final answer
    x = 249.37

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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.