Home / 2,742.28-3,786.08-1,947.27

Finding the Fourth Proportional to 2,742.28, 3,786.08 and 1,947.27

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Solution

The fourth proportional to 2,742.28, 3,786.08 and 1,947.27 is: 2,688.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,742.28 : 3,786.08 = 1,947.27 : x
  2. Step 2: Convert to fraction form
    2,742.28/3,786.08 = 1,947.27/x
  3. Step 3: Cross multiply
    2,742.28x = 3,786.08 × 1,947.27
  4. Step 4: Simplify right side
    2,742.28x = 7,372,520.00
  5. Step 5: Solve for x
    x = 7,372,520.00/2,742.28
  6. Step 6: Final answer
    x = 2,688.46

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Double scale
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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.