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Finding the Fourth Proportional to 191.40, 288.22 and 167.31

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Solution

The fourth proportional to 191.40, 288.22 and 167.31 is: 251.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.40 : 288.22 = 167.31 : x
  2. Step 2: Convert to fraction form
    191.40/288.22 = 167.31/x
  3. Step 3: Cross multiply
    191.40x = 288.22 × 167.31
  4. Step 4: Simplify right side
    191.40x = 48,222.09
  5. Step 5: Solve for x
    x = 48,222.09/191.40
  6. Step 6: Final answer
    x = 251.94

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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.