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Finding the Fourth Proportional to 275.37, 379.88 and 196.70

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Solution

The fourth proportional to 275.37, 379.88 and 196.70 is: 271.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.37 : 379.88 = 196.70 : x
  2. Step 2: Convert to fraction form
    275.37/379.88 = 196.70/x
  3. Step 3: Cross multiply
    275.37x = 379.88 × 196.70
  4. Step 4: Simplify right side
    275.37x = 74,722.40
  5. Step 5: Solve for x
    x = 74,722.40/275.37
  6. Step 6: Final answer
    x = 271.35

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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.