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Finding the Fourth Proportional to 201.90, 279.90 and 190.95

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Solution

The fourth proportional to 201.90, 279.90 and 190.95 is: 264.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.90 : 279.90 = 190.95 : x
  2. Step 2: Convert to fraction form
    201.90/279.90 = 190.95/x
  3. Step 3: Cross multiply
    201.90x = 279.90 × 190.95
  4. Step 4: Simplify right side
    201.90x = 53,446.91
  5. Step 5: Solve for x
    x = 53,446.91/201.90
  6. Step 6: Final answer
    x = 264.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.