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Finding the Fourth Proportional to 418.12, 625.81 and 308.38

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Solution

The fourth proportional to 418.12, 625.81 and 308.38 is: 461.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.12 : 625.81 = 308.38 : x
  2. Step 2: Convert to fraction form
    418.12/625.81 = 308.38/x
  3. Step 3: Cross multiply
    418.12x = 625.81 × 308.38
  4. Step 4: Simplify right side
    418.12x = 192,987.29
  5. Step 5: Solve for x
    x = 192,987.29/418.12
  6. Step 6: Final answer
    x = 461.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.