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Finding the Fourth Proportional to 254.31, 381.81 and 220.14

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Solution

The fourth proportional to 254.31, 381.81 and 220.14 is: 330.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.31 : 381.81 = 220.14 : x
  2. Step 2: Convert to fraction form
    254.31/381.81 = 220.14/x
  3. Step 3: Cross multiply
    254.31x = 381.81 × 220.14
  4. Step 4: Simplify right side
    254.31x = 84,053.55
  5. Step 5: Solve for x
    x = 84,053.55/254.31
  6. Step 6: Final answer
    x = 330.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.