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Finding the Fourth Proportional to 201.97, 279.08 and 158.64

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Solution

The fourth proportional to 201.97, 279.08 and 158.64 is: 219.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.97 : 279.08 = 158.64 : x
  2. Step 2: Convert to fraction form
    201.97/279.08 = 158.64/x
  3. Step 3: Cross multiply
    201.97x = 279.08 × 158.64
  4. Step 4: Simplify right side
    201.97x = 44,273.25
  5. Step 5: Solve for x
    x = 44,273.25/201.97
  6. Step 6: Final answer
    x = 219.21

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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.