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Finding the Fourth Proportional to 275.97, 380.78 and 177.71

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Solution

The fourth proportional to 275.97, 380.78 and 177.71 is: 245.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.97 : 380.78 = 177.71 : x
  2. Step 2: Convert to fraction form
    275.97/380.78 = 177.71/x
  3. Step 3: Cross multiply
    275.97x = 380.78 × 177.71
  4. Step 4: Simplify right side
    275.97x = 67,667.02
  5. Step 5: Solve for x
    x = 67,667.02/275.97
  6. Step 6: Final answer
    x = 245.20

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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.