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Finding the Fourth Proportional to 1,940.75, 2,911.19 and 770.97

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Solution

The fourth proportional to 1,940.75, 2,911.19 and 770.97 is: 1,156.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.75 : 2,911.19 = 770.97 : x
  2. Step 2: Convert to fraction form
    1,940.75/2,911.19 = 770.97/x
  3. Step 3: Cross multiply
    1,940.75x = 2,911.19 × 770.97
  4. Step 4: Simplify right side
    1,940.75x = 2,244,440.15
  5. Step 5: Solve for x
    x = 2,244,440.15/1,940.75
  6. Step 6: Final answer
    x = 1,156.48

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.