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Finding the Fourth Proportional to 311.22, 426.93 and 292.59

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Solution

The fourth proportional to 311.22, 426.93 and 292.59 is: 401.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.22 : 426.93 = 292.59 : x
  2. Step 2: Convert to fraction form
    311.22/426.93 = 292.59/x
  3. Step 3: Cross multiply
    311.22x = 426.93 × 292.59
  4. Step 4: Simplify right side
    311.22x = 124,915.45
  5. Step 5: Solve for x
    x = 124,915.45/311.22
  6. Step 6: Final answer
    x = 401.37

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.