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Finding the Fourth Proportional to 191.49, 285.85 and 168.43

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Solution

The fourth proportional to 191.49, 285.85 and 168.43 is: 251.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.49 : 285.85 = 168.43 : x
  2. Step 2: Convert to fraction form
    191.49/285.85 = 168.43/x
  3. Step 3: Cross multiply
    191.49x = 285.85 × 168.43
  4. Step 4: Simplify right side
    191.49x = 48,143.44
  5. Step 5: Solve for x
    x = 48,143.44/191.49
  6. Step 6: Final answer
    x = 251.41

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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.