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Finding the Fourth Proportional to 191.28, 286.50 and 117.96

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Solution

The fourth proportional to 191.28, 286.50 and 117.96 is: 176.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.28 : 286.50 = 117.96 : x
  2. Step 2: Convert to fraction form
    191.28/286.50 = 117.96/x
  3. Step 3: Cross multiply
    191.28x = 286.50 × 117.96
  4. Step 4: Simplify right side
    191.28x = 33,795.54
  5. Step 5: Solve for x
    x = 33,795.54/191.28
  6. Step 6: Final answer
    x = 176.68

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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.