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Finding the Fourth Proportional to 344.12, 474.79 and 196.72

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Solution

The fourth proportional to 344.12, 474.79 and 196.72 is: 271.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.12 : 474.79 = 196.72 : x
  2. Step 2: Convert to fraction form
    344.12/474.79 = 196.72/x
  3. Step 3: Cross multiply
    344.12x = 474.79 × 196.72
  4. Step 4: Simplify right side
    344.12x = 93,400.69
  5. Step 5: Solve for x
    x = 93,400.69/344.12
  6. Step 6: Final answer
    x = 271.42

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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.