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Finding the Fourth Proportional to 291.26, 401.55 and 225.98

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Solution

The fourth proportional to 291.26, 401.55 and 225.98 is: 311.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.26 : 401.55 = 225.98 : x
  2. Step 2: Convert to fraction form
    291.26/401.55 = 225.98/x
  3. Step 3: Cross multiply
    291.26x = 401.55 × 225.98
  4. Step 4: Simplify right side
    291.26x = 90,742.27
  5. Step 5: Solve for x
    x = 90,742.27/291.26
  6. Step 6: Final answer
    x = 311.55

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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.