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Finding the Fourth Proportional to 203.13, 306.20 and 191.39

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Solution

The fourth proportional to 203.13, 306.20 and 191.39 is: 288.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.13 : 306.20 = 191.39 : x
  2. Step 2: Convert to fraction form
    203.13/306.20 = 191.39/x
  3. Step 3: Cross multiply
    203.13x = 306.20 × 191.39
  4. Step 4: Simplify right side
    203.13x = 58,602.57
  5. Step 5: Solve for x
    x = 58,602.57/203.13
  6. Step 6: Final answer
    x = 288.50

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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.