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Finding the Fourth Proportional to 191.60, 287.25 and 109.25

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Solution

The fourth proportional to 191.60, 287.25 and 109.25 is: 163.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.60 : 287.25 = 109.25 : x
  2. Step 2: Convert to fraction form
    191.60/287.25 = 109.25/x
  3. Step 3: Cross multiply
    191.60x = 287.25 × 109.25
  4. Step 4: Simplify right side
    191.60x = 31,382.06
  5. Step 5: Solve for x
    x = 31,382.06/191.60
  6. Step 6: Final answer
    x = 163.79

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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.