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Finding the Fourth Proportional to 447.88, 618.21 and 282.09

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Solution

The fourth proportional to 447.88, 618.21 and 282.09 is: 389.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.88 : 618.21 = 282.09 : x
  2. Step 2: Convert to fraction form
    447.88/618.21 = 282.09/x
  3. Step 3: Cross multiply
    447.88x = 618.21 × 282.09
  4. Step 4: Simplify right side
    447.88x = 174,390.86
  5. Step 5: Solve for x
    x = 174,390.86/447.88
  6. Step 6: Final answer
    x = 389.37

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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.