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Finding the Fourth Proportional to 296.82, 409.38 and 218.11

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Solution

The fourth proportional to 296.82, 409.38 and 218.11 is: 300.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.82 : 409.38 = 218.11 : x
  2. Step 2: Convert to fraction form
    296.82/409.38 = 218.11/x
  3. Step 3: Cross multiply
    296.82x = 409.38 × 218.11
  4. Step 4: Simplify right side
    296.82x = 89,289.87
  5. Step 5: Solve for x
    x = 89,289.87/296.82
  6. Step 6: Final answer
    x = 300.82

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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.