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Finding the Fourth Proportional to 269.20, 404.40 and 259.44

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Solution

The fourth proportional to 269.20, 404.40 and 259.44 is: 389.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.20 : 404.40 = 259.44 : x
  2. Step 2: Convert to fraction form
    269.20/404.40 = 259.44/x
  3. Step 3: Cross multiply
    269.20x = 404.40 × 259.44
  4. Step 4: Simplify right side
    269.20x = 104,917.54
  5. Step 5: Solve for x
    x = 104,917.54/269.20
  6. Step 6: Final answer
    x = 389.74

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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.