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Finding the Fourth Proportional to 203.58, 306.92 and 190.80

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Solution

The fourth proportional to 203.58, 306.92 and 190.80 is: 287.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.58 : 306.92 = 190.80 : x
  2. Step 2: Convert to fraction form
    203.58/306.92 = 190.80/x
  3. Step 3: Cross multiply
    203.58x = 306.92 × 190.80
  4. Step 4: Simplify right side
    203.58x = 58,559.38
  5. Step 5: Solve for x
    x = 58,559.38/203.58
  6. Step 6: Final answer
    x = 287.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.