Home / 1,912.86-2,639.26-1,166.77

Finding the Fourth Proportional to 1,912.86, 2,639.26 and 1,166.77

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Solution

The fourth proportional to 1,912.86, 2,639.26 and 1,166.77 is: 1,609.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.86 : 2,639.26 = 1,166.77 : x
  2. Step 2: Convert to fraction form
    1,912.86/2,639.26 = 1,166.77/x
  3. Step 3: Cross multiply
    1,912.86x = 2,639.26 × 1,166.77
  4. Step 4: Simplify right side
    1,912.86x = 3,079,409.39
  5. Step 5: Solve for x
    x = 3,079,409.39/1,912.86
  6. Step 6: Final answer
    x = 1,609.85

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1.5x scale

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.