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Finding the Fourth Proportional to 395.25, 545.19 and 269.43

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Solution

The fourth proportional to 395.25, 545.19 and 269.43 is: 371.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.25 : 545.19 = 269.43 : x
  2. Step 2: Convert to fraction form
    395.25/545.19 = 269.43/x
  3. Step 3: Cross multiply
    395.25x = 545.19 × 269.43
  4. Step 4: Simplify right side
    395.25x = 146,890.54
  5. Step 5: Solve for x
    x = 146,890.54/395.25
  6. Step 6: Final answer
    x = 371.64

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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.