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Finding the Fourth Proportional to 270.50, 372.12 and 221.26

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Solution

The fourth proportional to 270.50, 372.12 and 221.26 is: 304.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.50 : 372.12 = 221.26 : x
  2. Step 2: Convert to fraction form
    270.50/372.12 = 221.26/x
  3. Step 3: Cross multiply
    270.50x = 372.12 × 221.26
  4. Step 4: Simplify right side
    270.50x = 82,335.27
  5. Step 5: Solve for x
    x = 82,335.27/270.50
  6. Step 6: Final answer
    x = 304.38

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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.