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Finding the Fourth Proportional to 245.38, 338.78 and 171.88

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Solution

The fourth proportional to 245.38, 338.78 and 171.88 is: 237.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.38 : 338.78 = 171.88 : x
  2. Step 2: Convert to fraction form
    245.38/338.78 = 171.88/x
  3. Step 3: Cross multiply
    245.38x = 338.78 × 171.88
  4. Step 4: Simplify right side
    245.38x = 58,229.51
  5. Step 5: Solve for x
    x = 58,229.51/245.38
  6. Step 6: Final answer
    x = 237.30

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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.