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Finding the Fourth Proportional to 494.47, 682.94 and 328.39

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Solution

The fourth proportional to 494.47, 682.94 and 328.39 is: 453.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.47 : 682.94 = 328.39 : x
  2. Step 2: Convert to fraction form
    494.47/682.94 = 328.39/x
  3. Step 3: Cross multiply
    494.47x = 682.94 × 328.39
  4. Step 4: Simplify right side
    494.47x = 224,269.85
  5. Step 5: Solve for x
    x = 224,269.85/494.47
  6. Step 6: Final answer
    x = 453.56

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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.