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Finding the Fourth Proportional to 447.90, 618.03 and 251.43

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Solution

The fourth proportional to 447.90, 618.03 and 251.43 is: 346.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.90 : 618.03 = 251.43 : x
  2. Step 2: Convert to fraction form
    447.90/618.03 = 251.43/x
  3. Step 3: Cross multiply
    447.90x = 618.03 × 251.43
  4. Step 4: Simplify right side
    447.90x = 155,391.28
  5. Step 5: Solve for x
    x = 155,391.28/447.90
  6. Step 6: Final answer
    x = 346.93

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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.