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Finding the Fourth Proportional to 191.33, 288.16 and 168.74

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Solution

The fourth proportional to 191.33, 288.16 and 168.74 is: 254.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.33 : 288.16 = 168.74 : x
  2. Step 2: Convert to fraction form
    191.33/288.16 = 168.74/x
  3. Step 3: Cross multiply
    191.33x = 288.16 × 168.74
  4. Step 4: Simplify right side
    191.33x = 48,623.27
  5. Step 5: Solve for x
    x = 48,623.27/191.33
  6. Step 6: Final answer
    x = 254.13

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.