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Finding the Fourth Proportional to 296.26, 408.96 and 213.40

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Solution

The fourth proportional to 296.26, 408.96 and 213.40 is: 294.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.26 : 408.96 = 213.40 : x
  2. Step 2: Convert to fraction form
    296.26/408.96 = 213.40/x
  3. Step 3: Cross multiply
    296.26x = 408.96 × 213.40
  4. Step 4: Simplify right side
    296.26x = 87,272.06
  5. Step 5: Solve for x
    x = 87,272.06/296.26
  6. Step 6: Final answer
    x = 294.58

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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.