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Finding the Fourth Proportional to 199.25, 298.84 and 91.02

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Solution

The fourth proportional to 199.25, 298.84 and 91.02 is: 136.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.25 : 298.84 = 91.02 : x
  2. Step 2: Convert to fraction form
    199.25/298.84 = 91.02/x
  3. Step 3: Cross multiply
    199.25x = 298.84 × 91.02
  4. Step 4: Simplify right side
    199.25x = 27,200.42
  5. Step 5: Solve for x
    x = 27,200.42/199.25
  6. Step 6: Final answer
    x = 136.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.