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Finding the Fourth Proportional to 254.82, 380.45 and 239.38

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Solution

The fourth proportional to 254.82, 380.45 and 239.38 is: 357.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.82 : 380.45 = 239.38 : x
  2. Step 2: Convert to fraction form
    254.82/380.45 = 239.38/x
  3. Step 3: Cross multiply
    254.82x = 380.45 × 239.38
  4. Step 4: Simplify right side
    254.82x = 91,072.12
  5. Step 5: Solve for x
    x = 91,072.12/254.82
  6. Step 6: Final answer
    x = 357.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.