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Finding the Fourth Proportional to 494.56, 682.55 and 308.23

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Solution

The fourth proportional to 494.56, 682.55 and 308.23 is: 425.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.56 : 682.55 = 308.23 : x
  2. Step 2: Convert to fraction form
    494.56/682.55 = 308.23/x
  3. Step 3: Cross multiply
    494.56x = 682.55 × 308.23
  4. Step 4: Simplify right side
    494.56x = 210,380.85
  5. Step 5: Solve for x
    x = 210,380.85/494.56
  6. Step 6: Final answer
    x = 425.39

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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.