Home / 3,720.76-5,579.61-1,380.90

Finding the Fourth Proportional to 3,720.76, 5,579.61 and 1,380.90

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Solution

The fourth proportional to 3,720.76, 5,579.61 and 1,380.90 is: 2,070.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.76 : 5,579.61 = 1,380.90 : x
  2. Step 2: Convert to fraction form
    3,720.76/5,579.61 = 1,380.90/x
  3. Step 3: Cross multiply
    3,720.76x = 5,579.61 × 1,380.90
  4. Step 4: Simplify right side
    3,720.76x = 7,704,883.45
  5. Step 5: Solve for x
    x = 7,704,883.45/3,720.76
  6. Step 6: Final answer
    x = 2,070.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.