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Finding the Fourth Proportional to 275.25, 379.86 and 254.64

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Solution

The fourth proportional to 275.25, 379.86 and 254.64 is: 351.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.25 : 379.86 = 254.64 : x
  2. Step 2: Convert to fraction form
    275.25/379.86 = 254.64/x
  3. Step 3: Cross multiply
    275.25x = 379.86 × 254.64
  4. Step 4: Simplify right side
    275.25x = 96,727.55
  5. Step 5: Solve for x
    x = 96,727.55/275.25
  6. Step 6: Final answer
    x = 351.42

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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.