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Finding the Fourth Proportional to 198.83, 273.79 and 157.25

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Solution

The fourth proportional to 198.83, 273.79 and 157.25 is: 216.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.83 : 273.79 = 157.25 : x
  2. Step 2: Convert to fraction form
    198.83/273.79 = 157.25/x
  3. Step 3: Cross multiply
    198.83x = 273.79 × 157.25
  4. Step 4: Simplify right side
    198.83x = 43,054.36
  5. Step 5: Solve for x
    x = 43,054.36/198.83
  6. Step 6: Final answer
    x = 216.54

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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.