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Finding the Fourth Proportional to 319.54, 441.17 and 201.68

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Solution

The fourth proportional to 319.54, 441.17 and 201.68 is: 278.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.54 : 441.17 = 201.68 : x
  2. Step 2: Convert to fraction form
    319.54/441.17 = 201.68/x
  3. Step 3: Cross multiply
    319.54x = 441.17 × 201.68
  4. Step 4: Simplify right side
    319.54x = 88,975.17
  5. Step 5: Solve for x
    x = 88,975.17/319.54
  6. Step 6: Final answer
    x = 278.45

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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.