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Finding the Fourth Proportional to 296.44, 408.72 and 261.64

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Solution

The fourth proportional to 296.44, 408.72 and 261.64 is: 360.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.44 : 408.72 = 261.64 : x
  2. Step 2: Convert to fraction form
    296.44/408.72 = 261.64/x
  3. Step 3: Cross multiply
    296.44x = 408.72 × 261.64
  4. Step 4: Simplify right side
    296.44x = 106,937.50
  5. Step 5: Solve for x
    x = 106,937.50/296.44
  6. Step 6: Final answer
    x = 360.74

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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.