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Finding the Fourth Proportional to 207.75, 313.22 and 196.50

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Solution

The fourth proportional to 207.75, 313.22 and 196.50 is: 296.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.75 : 313.22 = 196.50 : x
  2. Step 2: Convert to fraction form
    207.75/313.22 = 196.50/x
  3. Step 3: Cross multiply
    207.75x = 313.22 × 196.50
  4. Step 4: Simplify right side
    207.75x = 61,546.75
  5. Step 5: Solve for x
    x = 61,546.75/207.75
  6. Step 6: Final answer
    x = 296.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.