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Finding the Fourth Proportional to 296.61, 408.91 and 255.60

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Solution

The fourth proportional to 296.61, 408.91 and 255.60 is: 352.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.61 : 408.91 = 255.60 : x
  2. Step 2: Convert to fraction form
    296.61/408.91 = 255.60/x
  3. Step 3: Cross multiply
    296.61x = 408.91 × 255.60
  4. Step 4: Simplify right side
    296.61x = 104,517.40
  5. Step 5: Solve for x
    x = 104,517.40/296.61
  6. Step 6: Final answer
    x = 352.37

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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.