Home / 2,720.12-4,080.36-845.75

Finding the Fourth Proportional to 2,720.12, 4,080.36 and 845.75

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Solution

The fourth proportional to 2,720.12, 4,080.36 and 845.75 is: 1,268.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.12 : 4,080.36 = 845.75 : x
  2. Step 2: Convert to fraction form
    2,720.12/4,080.36 = 845.75/x
  3. Step 3: Cross multiply
    2,720.12x = 4,080.36 × 845.75
  4. Step 4: Simplify right side
    2,720.12x = 3,450,964.47
  5. Step 5: Solve for x
    x = 3,450,964.47/2,720.12
  6. Step 6: Final answer
    x = 1,268.68

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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.