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Finding the Fourth Proportional to 494.91, 682.98 and 308.46

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Solution

The fourth proportional to 494.91, 682.98 and 308.46 is: 425.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.91 : 682.98 = 308.46 : x
  2. Step 2: Convert to fraction form
    494.91/682.98 = 308.46/x
  3. Step 3: Cross multiply
    494.91x = 682.98 × 308.46
  4. Step 4: Simplify right side
    494.91x = 210,671.31
  5. Step 5: Solve for x
    x = 210,671.31/494.91
  6. Step 6: Final answer
    x = 425.68

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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.