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Finding the Fourth Proportional to 269.94, 404.45 and 218.61

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Solution

The fourth proportional to 269.94, 404.45 and 218.61 is: 327.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.94 : 404.45 = 218.61 : x
  2. Step 2: Convert to fraction form
    269.94/404.45 = 218.61/x
  3. Step 3: Cross multiply
    269.94x = 404.45 × 218.61
  4. Step 4: Simplify right side
    269.94x = 88,416.81
  5. Step 5: Solve for x
    x = 88,416.81/269.94
  6. Step 6: Final answer
    x = 327.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.