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Finding the Fourth Proportional to 201.91, 278.62 and 119.05

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Solution

The fourth proportional to 201.91, 278.62 and 119.05 is: 164.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.91 : 278.62 = 119.05 : x
  2. Step 2: Convert to fraction form
    201.91/278.62 = 119.05/x
  3. Step 3: Cross multiply
    201.91x = 278.62 × 119.05
  4. Step 4: Simplify right side
    201.91x = 33,169.71
  5. Step 5: Solve for x
    x = 33,169.71/201.91
  6. Step 6: Final answer
    x = 164.28

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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.