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Finding the Fourth Proportional to 199.87, 275.77 and 190.42

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Solution

The fourth proportional to 199.87, 275.77 and 190.42 is: 262.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.87 : 275.77 = 190.42 : x
  2. Step 2: Convert to fraction form
    199.87/275.77 = 190.42/x
  3. Step 3: Cross multiply
    199.87x = 275.77 × 190.42
  4. Step 4: Simplify right side
    199.87x = 52,512.12
  5. Step 5: Solve for x
    x = 52,512.12/199.87
  6. Step 6: Final answer
    x = 262.73

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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.