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Finding the Fourth Proportional to 447.36, 618.33 and 394.53

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Solution

The fourth proportional to 447.36, 618.33 and 394.53 is: 545.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.36 : 618.33 = 394.53 : x
  2. Step 2: Convert to fraction form
    447.36/618.33 = 394.53/x
  3. Step 3: Cross multiply
    447.36x = 618.33 × 394.53
  4. Step 4: Simplify right side
    447.36x = 243,949.73
  5. Step 5: Solve for x
    x = 243,949.73/447.36
  6. Step 6: Final answer
    x = 545.31

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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.