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Finding the Fourth Proportional to 291.44, 401.96 and 225.84

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Solution

The fourth proportional to 291.44, 401.96 and 225.84 is: 311.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.44 : 401.96 = 225.84 : x
  2. Step 2: Convert to fraction form
    291.44/401.96 = 225.84/x
  3. Step 3: Cross multiply
    291.44x = 401.96 × 225.84
  4. Step 4: Simplify right side
    291.44x = 90,778.65
  5. Step 5: Solve for x
    x = 90,778.65/291.44
  6. Step 6: Final answer
    x = 311.48

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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.