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Finding the Fourth Proportional to 275.44, 380.64 and 222.88

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Solution

The fourth proportional to 275.44, 380.64 and 222.88 is: 308.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.44 : 380.64 = 222.88 : x
  2. Step 2: Convert to fraction form
    275.44/380.64 = 222.88/x
  3. Step 3: Cross multiply
    275.44x = 380.64 × 222.88
  4. Step 4: Simplify right side
    275.44x = 84,837.04
  5. Step 5: Solve for x
    x = 84,837.04/275.44
  6. Step 6: Final answer
    x = 308.01

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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.