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Finding the Fourth Proportional to 351.81, 485.51 and 196.56

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Solution

The fourth proportional to 351.81, 485.51 and 196.56 is: 271.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.81 : 485.51 = 196.56 : x
  2. Step 2: Convert to fraction form
    351.81/485.51 = 196.56/x
  3. Step 3: Cross multiply
    351.81x = 485.51 × 196.56
  4. Step 4: Simplify right side
    351.81x = 95,431.85
  5. Step 5: Solve for x
    x = 95,431.85/351.81
  6. Step 6: Final answer
    x = 271.26

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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.