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Finding the Fourth Proportional to 296.16, 408.20 and 287.44

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Solution

The fourth proportional to 296.16, 408.20 and 287.44 is: 396.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.16 : 408.20 = 287.44 : x
  2. Step 2: Convert to fraction form
    296.16/408.20 = 287.44/x
  3. Step 3: Cross multiply
    296.16x = 408.20 × 287.44
  4. Step 4: Simplify right side
    296.16x = 117,333.01
  5. Step 5: Solve for x
    x = 117,333.01/296.16
  6. Step 6: Final answer
    x = 396.18

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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.