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Finding the Fourth Proportional to 496.60, 685.53 and 349.79

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Solution

The fourth proportional to 496.60, 685.53 and 349.79 is: 482.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.60 : 685.53 = 349.79 : x
  2. Step 2: Convert to fraction form
    496.60/685.53 = 349.79/x
  3. Step 3: Cross multiply
    496.60x = 685.53 × 349.79
  4. Step 4: Simplify right side
    496.60x = 239,788.11
  5. Step 5: Solve for x
    x = 239,788.11/496.60
  6. Step 6: Final answer
    x = 482.86

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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.