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Finding the Fourth Proportional to 496.86, 685.34 and 339.21

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Solution

The fourth proportional to 496.86, 685.34 and 339.21 is: 467.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.86 : 685.34 = 339.21 : x
  2. Step 2: Convert to fraction form
    496.86/685.34 = 339.21/x
  3. Step 3: Cross multiply
    496.86x = 685.34 × 339.21
  4. Step 4: Simplify right side
    496.86x = 232,474.73
  5. Step 5: Solve for x
    x = 232,474.73/496.86
  6. Step 6: Final answer
    x = 467.89

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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.