Home / 2,820.39-4,230.78-845.85

Finding the Fourth Proportional to 2,820.39, 4,230.78 and 845.85

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Solution

The fourth proportional to 2,820.39, 4,230.78 and 845.85 is: 1,268.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.39 : 4,230.78 = 845.85 : x
  2. Step 2: Convert to fraction form
    2,820.39/4,230.78 = 845.85/x
  3. Step 3: Cross multiply
    2,820.39x = 4,230.78 × 845.85
  4. Step 4: Simplify right side
    2,820.39x = 3,578,605.26
  5. Step 5: Solve for x
    x = 3,578,605.26/2,820.39
  6. Step 6: Final answer
    x = 1,268.83

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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.