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Finding the Fourth Proportional to 191.59, 287.03 and 118.28

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Solution

The fourth proportional to 191.59, 287.03 and 118.28 is: 177.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.59 : 287.03 = 118.28 : x
  2. Step 2: Convert to fraction form
    191.59/287.03 = 118.28/x
  3. Step 3: Cross multiply
    191.59x = 287.03 × 118.28
  4. Step 4: Simplify right side
    191.59x = 33,949.14
  5. Step 5: Solve for x
    x = 33,949.14/191.59
  6. Step 6: Final answer
    x = 177.19

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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.