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Finding the Fourth Proportional to 191.87, 288.36 and 159.57

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Solution

The fourth proportional to 191.87, 288.36 and 159.57 is: 239.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.87 : 288.36 = 159.57 : x
  2. Step 2: Convert to fraction form
    191.87/288.36 = 159.57/x
  3. Step 3: Cross multiply
    191.87x = 288.36 × 159.57
  4. Step 4: Simplify right side
    191.87x = 46,013.61
  5. Step 5: Solve for x
    x = 46,013.61/191.87
  6. Step 6: Final answer
    x = 239.82

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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.