Home / 2,261.20-3,120.32-1,266.28

Finding the Fourth Proportional to 2,261.20, 3,120.32 and 1,266.28

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Solution

The fourth proportional to 2,261.20, 3,120.32 and 1,266.28 is: 1,747.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.20 : 3,120.32 = 1,266.28 : x
  2. Step 2: Convert to fraction form
    2,261.20/3,120.32 = 1,266.28/x
  3. Step 3: Cross multiply
    2,261.20x = 3,120.32 × 1,266.28
  4. Step 4: Simplify right side
    2,261.20x = 3,951,198.81
  5. Step 5: Solve for x
    x = 3,951,198.81/2,261.20
  6. Step 6: Final answer
    x = 1,747.39

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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.