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Finding the Fourth Proportional to 2,768.21, 3,818.03 and 1,928.91

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Solution

The fourth proportional to 2,768.21, 3,818.03 and 1,928.91 is: 2,660.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.21 : 3,818.03 = 1,928.91 : x
  2. Step 2: Convert to fraction form
    2,768.21/3,818.03 = 1,928.91/x
  3. Step 3: Cross multiply
    2,768.21x = 3,818.03 × 1,928.91
  4. Step 4: Simplify right side
    2,768.21x = 7,364,626.60
  5. Step 5: Solve for x
    x = 7,364,626.60/2,768.21
  6. Step 6: Final answer
    x = 2,660.43

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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.