Home / 3,940.97-5,911.13-1,307.61

Finding the Fourth Proportional to 3,940.97, 5,911.13 and 1,307.61

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Solution

The fourth proportional to 3,940.97, 5,911.13 and 1,307.61 is: 1,961.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.97 : 5,911.13 = 1,307.61 : x
  2. Step 2: Convert to fraction form
    3,940.97/5,911.13 = 1,307.61/x
  3. Step 3: Cross multiply
    3,940.97x = 5,911.13 × 1,307.61
  4. Step 4: Simplify right side
    3,940.97x = 7,729,446.16
  5. Step 5: Solve for x
    x = 7,729,446.16/3,940.97
  6. Step 6: Final answer
    x = 1,961.31

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Why These Related Problems?

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