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Finding the Fourth Proportional to 395.89, 545.09 and 325.73

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Solution

The fourth proportional to 395.89, 545.09 and 325.73 is: 448.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.89 : 545.09 = 325.73 : x
  2. Step 2: Convert to fraction form
    395.89/545.09 = 325.73/x
  3. Step 3: Cross multiply
    395.89x = 545.09 × 325.73
  4. Step 4: Simplify right side
    395.89x = 177,549.64
  5. Step 5: Solve for x
    x = 177,549.64/395.89
  6. Step 6: Final answer
    x = 448.48

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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.