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Finding the Fourth Proportional to 447.93, 618.36 and 315.44

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Solution

The fourth proportional to 447.93, 618.36 and 315.44 is: 435.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.93 : 618.36 = 315.44 : x
  2. Step 2: Convert to fraction form
    447.93/618.36 = 315.44/x
  3. Step 3: Cross multiply
    447.93x = 618.36 × 315.44
  4. Step 4: Simplify right side
    447.93x = 195,057.89
  5. Step 5: Solve for x
    x = 195,057.89/447.93
  6. Step 6: Final answer
    x = 435.47

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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.