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Finding the Fourth Proportional to 203.13, 278.49 and 199.48

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Solution

The fourth proportional to 203.13, 278.49 and 199.48 is: 273.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.13 : 278.49 = 199.48 : x
  2. Step 2: Convert to fraction form
    203.13/278.49 = 199.48/x
  3. Step 3: Cross multiply
    203.13x = 278.49 × 199.48
  4. Step 4: Simplify right side
    203.13x = 55,553.19
  5. Step 5: Solve for x
    x = 55,553.19/203.13
  6. Step 6: Final answer
    x = 273.49

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.