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Finding the Fourth Proportional to 212.72, 293.92 and 169.40

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Solution

The fourth proportional to 212.72, 293.92 and 169.40 is: 234.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.72 : 293.92 = 169.40 : x
  2. Step 2: Convert to fraction form
    212.72/293.92 = 169.40/x
  3. Step 3: Cross multiply
    212.72x = 293.92 × 169.40
  4. Step 4: Simplify right side
    212.72x = 49,790.05
  5. Step 5: Solve for x
    x = 49,790.05/212.72
  6. Step 6: Final answer
    x = 234.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.