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Finding the Fourth Proportional to 275.11, 379.63 and 158.71

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Solution

The fourth proportional to 275.11, 379.63 and 158.71 is: 219.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.11 : 379.63 = 158.71 : x
  2. Step 2: Convert to fraction form
    275.11/379.63 = 158.71/x
  3. Step 3: Cross multiply
    275.11x = 379.63 × 158.71
  4. Step 4: Simplify right side
    275.11x = 60,251.08
  5. Step 5: Solve for x
    x = 60,251.08/275.11
  6. Step 6: Final answer
    x = 219.01

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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.