Home / 3,720.44-5,135.28-2,979.56

Finding the Fourth Proportional to 3,720.44, 5,135.28 and 2,979.56

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Solution

The fourth proportional to 3,720.44, 5,135.28 and 2,979.56 is: 4,112.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.44 : 5,135.28 = 2,979.56 : x
  2. Step 2: Convert to fraction form
    3,720.44/5,135.28 = 2,979.56/x
  3. Step 3: Cross multiply
    3,720.44x = 5,135.28 × 2,979.56
  4. Step 4: Simplify right side
    3,720.44x = 15,300,874.88
  5. Step 5: Solve for x
    x = 15,300,874.88/3,720.44
  6. Step 6: Final answer
    x = 4,112.65

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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.