Home / 1,912.59-2,639.21-1,166.78

Finding the Fourth Proportional to 1,912.59, 2,639.21 and 1,166.78

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Solution

The fourth proportional to 1,912.59, 2,639.21 and 1,166.78 is: 1,610.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.59 : 2,639.21 = 1,166.78 : x
  2. Step 2: Convert to fraction form
    1,912.59/2,639.21 = 1,166.78/x
  3. Step 3: Cross multiply
    1,912.59x = 2,639.21 × 1,166.78
  4. Step 4: Simplify right side
    1,912.59x = 3,079,358.41
  5. Step 5: Solve for x
    x = 3,079,358.41/1,912.59
  6. Step 6: Final answer
    x = 1,610.05

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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.