Home / 2,143.80-3,217.23-845.19

Finding the Fourth Proportional to 2,143.80, 3,217.23 and 845.19

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Solution

The fourth proportional to 2,143.80, 3,217.23 and 845.19 is: 1,268.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.80 : 3,217.23 = 845.19 : x
  2. Step 2: Convert to fraction form
    2,143.80/3,217.23 = 845.19/x
  3. Step 3: Cross multiply
    2,143.80x = 3,217.23 × 845.19
  4. Step 4: Simplify right side
    2,143.80x = 2,719,170.62
  5. Step 5: Solve for x
    x = 2,719,170.62/2,143.80
  6. Step 6: Final answer
    x = 1,268.39

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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.