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Finding the Fourth Proportional to 191.40, 286.03 and 154.43

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Solution

The fourth proportional to 191.40, 286.03 and 154.43 is: 230.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.40 : 286.03 = 154.43 : x
  2. Step 2: Convert to fraction form
    191.40/286.03 = 154.43/x
  3. Step 3: Cross multiply
    191.40x = 286.03 × 154.43
  4. Step 4: Simplify right side
    191.40x = 44,171.61
  5. Step 5: Solve for x
    x = 44,171.61/191.40
  6. Step 6: Final answer
    x = 230.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.