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Finding the Fourth Proportional to 171.39, 256.77 and 141.15

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Solution

The fourth proportional to 171.39, 256.77 and 141.15 is: 211.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.39 : 256.77 = 141.15 : x
  2. Step 2: Convert to fraction form
    171.39/256.77 = 141.15/x
  3. Step 3: Cross multiply
    171.39x = 256.77 × 141.15
  4. Step 4: Simplify right side
    171.39x = 36,243.09
  5. Step 5: Solve for x
    x = 36,243.09/171.39
  6. Step 6: Final answer
    x = 211.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.