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Finding the Fourth Proportional to 319.80, 441.16 and 201.96

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Solution

The fourth proportional to 319.80, 441.16 and 201.96 is: 278.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.80 : 441.16 = 201.96 : x
  2. Step 2: Convert to fraction form
    319.80/441.16 = 201.96/x
  3. Step 3: Cross multiply
    319.80x = 441.16 × 201.96
  4. Step 4: Simplify right side
    319.80x = 89,096.67
  5. Step 5: Solve for x
    x = 89,096.67/319.80
  6. Step 6: Final answer
    x = 278.60

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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.