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Finding the Fourth Proportional to 290.94, 401.36 and 197.75

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Solution

The fourth proportional to 290.94, 401.36 and 197.75 is: 272.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.94 : 401.36 = 197.75 : x
  2. Step 2: Convert to fraction form
    290.94/401.36 = 197.75/x
  3. Step 3: Cross multiply
    290.94x = 401.36 × 197.75
  4. Step 4: Simplify right side
    290.94x = 79,365.94
  5. Step 5: Solve for x
    x = 79,365.94/290.94
  6. Step 6: Final answer
    x = 272.79

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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.