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Finding the Fourth Proportional to 363.26, 545.09 and 209.31

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Solution

The fourth proportional to 363.26, 545.09 and 209.31 is: 314.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.26 : 545.09 = 209.31 : x
  2. Step 2: Convert to fraction form
    363.26/545.09 = 209.31/x
  3. Step 3: Cross multiply
    363.26x = 545.09 × 209.31
  4. Step 4: Simplify right side
    363.26x = 114,091.74
  5. Step 5: Solve for x
    x = 114,091.74/363.26
  6. Step 6: Final answer
    x = 314.08

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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.