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Finding the Fourth Proportional to 447.95, 618.37 and 329.72

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Solution

The fourth proportional to 447.95, 618.37 and 329.72 is: 455.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.95 : 618.37 = 329.72 : x
  2. Step 2: Convert to fraction form
    447.95/618.37 = 329.72/x
  3. Step 3: Cross multiply
    447.95x = 618.37 × 329.72
  4. Step 4: Simplify right side
    447.95x = 203,885.04
  5. Step 5: Solve for x
    x = 203,885.04/447.95
  6. Step 6: Final answer
    x = 455.15

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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.