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Finding the Fourth Proportional to 275.96, 380.84 and 151.61

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Solution

The fourth proportional to 275.96, 380.84 and 151.61 is: 209.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.96 : 380.84 = 151.61 : x
  2. Step 2: Convert to fraction form
    275.96/380.84 = 151.61/x
  3. Step 3: Cross multiply
    275.96x = 380.84 × 151.61
  4. Step 4: Simplify right side
    275.96x = 57,736.49
  5. Step 5: Solve for x
    x = 57,736.49/275.96
  6. Step 6: Final answer
    x = 209.22

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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.