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Finding the Fourth Proportional to 275.12, 379.75 and 186.73

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Solution

The fourth proportional to 275.12, 379.75 and 186.73 is: 257.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.12 : 379.75 = 186.73 : x
  2. Step 2: Convert to fraction form
    275.12/379.75 = 186.73/x
  3. Step 3: Cross multiply
    275.12x = 379.75 × 186.73
  4. Step 4: Simplify right side
    275.12x = 70,910.72
  5. Step 5: Solve for x
    x = 70,910.72/275.12
  6. Step 6: Final answer
    x = 257.74

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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.