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Finding the Fourth Proportional to 309.27, 426.80 and 169.39

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Solution

The fourth proportional to 309.27, 426.80 and 169.39 is: 233.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.27 : 426.80 = 169.39 : x
  2. Step 2: Convert to fraction form
    309.27/426.80 = 169.39/x
  3. Step 3: Cross multiply
    309.27x = 426.80 × 169.39
  4. Step 4: Simplify right side
    309.27x = 72,294.81
  5. Step 5: Solve for x
    x = 72,294.81/309.27
  6. Step 6: Final answer
    x = 233.76

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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.