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Finding the Fourth Proportional to 494.60, 682.62 and 308.29

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Solution

The fourth proportional to 494.60, 682.62 and 308.29 is: 425.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.60 : 682.62 = 308.29 : x
  2. Step 2: Convert to fraction form
    494.60/682.62 = 308.29/x
  3. Step 3: Cross multiply
    494.60x = 682.62 × 308.29
  4. Step 4: Simplify right side
    494.60x = 210,444.20
  5. Step 5: Solve for x
    x = 210,444.20/494.60
  6. Step 6: Final answer
    x = 425.49

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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.