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Finding the Fourth Proportional to 296.67, 409.20 and 218.14

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Solution

The fourth proportional to 296.67, 409.20 and 218.14 is: 300.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.67 : 409.20 = 218.14 : x
  2. Step 2: Convert to fraction form
    296.67/409.20 = 218.14/x
  3. Step 3: Cross multiply
    296.67x = 409.20 × 218.14
  4. Step 4: Simplify right side
    296.67x = 89,262.89
  5. Step 5: Solve for x
    x = 89,262.89/296.67
  6. Step 6: Final answer
    x = 300.88

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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.