Home / 2,629.76-3,945.80-1,396.87

Finding the Fourth Proportional to 2,629.76, 3,945.80 and 1,396.87

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Solution

The fourth proportional to 2,629.76, 3,945.80 and 1,396.87 is: 2,095.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.76 : 3,945.80 = 1,396.87 : x
  2. Step 2: Convert to fraction form
    2,629.76/3,945.80 = 1,396.87/x
  3. Step 3: Cross multiply
    2,629.76x = 3,945.80 × 1,396.87
  4. Step 4: Simplify right side
    2,629.76x = 5,511,752.80
  5. Step 5: Solve for x
    x = 5,511,752.80/2,629.76
  6. Step 6: Final answer
    x = 2,095.92

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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.