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Finding the Fourth Proportional to 270.36, 372.74 and 221.16

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Solution

The fourth proportional to 270.36, 372.74 and 221.16 is: 304.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.36 : 372.74 = 221.16 : x
  2. Step 2: Convert to fraction form
    270.36/372.74 = 221.16/x
  3. Step 3: Cross multiply
    270.36x = 372.74 × 221.16
  4. Step 4: Simplify right side
    270.36x = 82,435.18
  5. Step 5: Solve for x
    x = 82,435.18/270.36
  6. Step 6: Final answer
    x = 304.91

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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.