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Finding the Fourth Proportional to 296.43, 408.72 and 213.81

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Solution

The fourth proportional to 296.43, 408.72 and 213.81 is: 294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.43 : 408.72 = 213.81 : x
  2. Step 2: Convert to fraction form
    296.43/408.72 = 213.81/x
  3. Step 3: Cross multiply
    296.43x = 408.72 × 213.81
  4. Step 4: Simplify right side
    296.43x = 87,388.42
  5. Step 5: Solve for x
    x = 87,388.42/296.43
  6. Step 6: Final answer
    x = 294.80

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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.