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Finding the Fourth Proportional to 191.62, 286.86 and 122.98

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Solution

The fourth proportional to 191.62, 286.86 and 122.98 is: 184.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.62 : 286.86 = 122.98 : x
  2. Step 2: Convert to fraction form
    191.62/286.86 = 122.98/x
  3. Step 3: Cross multiply
    191.62x = 286.86 × 122.98
  4. Step 4: Simplify right side
    191.62x = 35,278.04
  5. Step 5: Solve for x
    x = 35,278.04/191.62
  6. Step 6: Final answer
    x = 184.10

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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.