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Finding the Fourth Proportional to 301.95, 416.34 and 196.89

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Solution

The fourth proportional to 301.95, 416.34 and 196.89 is: 271.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.95 : 416.34 = 196.89 : x
  2. Step 2: Convert to fraction form
    301.95/416.34 = 196.89/x
  3. Step 3: Cross multiply
    301.95x = 416.34 × 196.89
  4. Step 4: Simplify right side
    301.95x = 81,974.22
  5. Step 5: Solve for x
    x = 81,974.22/301.95
  6. Step 6: Final answer
    x = 271.48

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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.