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Finding the Fourth Proportional to 296.82, 408.57 and 261.72

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Solution

The fourth proportional to 296.82, 408.57 and 261.72 is: 360.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.82 : 408.57 = 261.72 : x
  2. Step 2: Convert to fraction form
    296.82/408.57 = 261.72/x
  3. Step 3: Cross multiply
    296.82x = 408.57 × 261.72
  4. Step 4: Simplify right side
    296.82x = 106,930.94
  5. Step 5: Solve for x
    x = 106,930.94/296.82
  6. Step 6: Final answer
    x = 360.26

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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.