Home / 3,012.78-4,157.36-2,305.12

Finding the Fourth Proportional to 3,012.78, 4,157.36 and 2,305.12

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Solution

The fourth proportional to 3,012.78, 4,157.36 and 2,305.12 is: 3,180.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,012.78 : 4,157.36 = 2,305.12 : x
  2. Step 2: Convert to fraction form
    3,012.78/4,157.36 = 2,305.12/x
  3. Step 3: Cross multiply
    3,012.78x = 4,157.36 × 2,305.12
  4. Step 4: Simplify right side
    3,012.78x = 9,583,213.68
  5. Step 5: Solve for x
    x = 9,583,213.68/3,012.78
  6. Step 6: Final answer
    x = 3,180.85

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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.