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Finding the Fourth Proportional to 349.87, 485.02 and 331.37

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Solution

The fourth proportional to 349.87, 485.02 and 331.37 is: 459.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.87 : 485.02 = 331.37 : x
  2. Step 2: Convert to fraction form
    349.87/485.02 = 331.37/x
  3. Step 3: Cross multiply
    349.87x = 485.02 × 331.37
  4. Step 4: Simplify right side
    349.87x = 160,721.08
  5. Step 5: Solve for x
    x = 160,721.08/349.87
  6. Step 6: Final answer
    x = 459.37

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.