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Finding the Fourth Proportional to 275.98, 380.79 and 157.96

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Solution

The fourth proportional to 275.98, 380.79 and 157.96 is: 217.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.98 : 380.79 = 157.96 : x
  2. Step 2: Convert to fraction form
    275.98/380.79 = 157.96/x
  3. Step 3: Cross multiply
    275.98x = 380.79 × 157.96
  4. Step 4: Simplify right side
    275.98x = 60,149.59
  5. Step 5: Solve for x
    x = 60,149.59/275.98
  6. Step 6: Final answer
    x = 217.95

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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.