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Finding the Fourth Proportional to 187.71, 258.96 and 168

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Solution

The fourth proportional to 187.71, 258.96 and 168 is: 231.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.71 : 258.96 = 168 : x
  2. Step 2: Convert to fraction form
    187.71/258.96 = 168/x
  3. Step 3: Cross multiply
    187.71x = 258.96 × 168
  4. Step 4: Simplify right side
    187.71x = 43,505.28
  5. Step 5: Solve for x
    x = 43,505.28/187.71
  6. Step 6: Final answer
    x = 231.77

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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.