Home / 2,768.85-3,819.56-1,928.07

Finding the Fourth Proportional to 2,768.85, 3,819.56 and 1,928.07

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Solution

The fourth proportional to 2,768.85, 3,819.56 and 1,928.07 is: 2,659.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.85 : 3,819.56 = 1,928.07 : x
  2. Step 2: Convert to fraction form
    2,768.85/3,819.56 = 1,928.07/x
  3. Step 3: Cross multiply
    2,768.85x = 3,819.56 × 1,928.07
  4. Step 4: Simplify right side
    2,768.85x = 7,364,369.41
  5. Step 5: Solve for x
    x = 7,364,369.41/2,768.85
  6. Step 6: Final answer
    x = 2,659.72

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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.