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Finding the Fourth Proportional to 254.66, 379.68 and 239.17

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Solution

The fourth proportional to 254.66, 379.68 and 239.17 is: 356.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.66 : 379.68 = 239.17 : x
  2. Step 2: Convert to fraction form
    254.66/379.68 = 239.17/x
  3. Step 3: Cross multiply
    254.66x = 379.68 × 239.17
  4. Step 4: Simplify right side
    254.66x = 90,804.97
  5. Step 5: Solve for x
    x = 90,804.97/254.66
  6. Step 6: Final answer
    x = 356.57

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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.