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Finding the Fourth Proportional to 199.80, 275.09 and 178.97

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Solution

The fourth proportional to 199.80, 275.09 and 178.97 is: 246.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.80 : 275.09 = 178.97 : x
  2. Step 2: Convert to fraction form
    199.80/275.09 = 178.97/x
  3. Step 3: Cross multiply
    199.80x = 275.09 × 178.97
  4. Step 4: Simplify right side
    199.80x = 49,230.59
  5. Step 5: Solve for x
    x = 49,230.59/199.80
  6. Step 6: Final answer
    x = 246.40

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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.