Home / 2,143.20-3,216.01-845.58

Finding the Fourth Proportional to 2,143.20, 3,216.01 and 845.58

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Solution

The fourth proportional to 2,143.20, 3,216.01 and 845.58 is: 1,268.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.20 : 3,216.01 = 845.58 : x
  2. Step 2: Convert to fraction form
    2,143.20/3,216.01 = 845.58/x
  3. Step 3: Cross multiply
    2,143.20x = 3,216.01 × 845.58
  4. Step 4: Simplify right side
    2,143.20x = 2,719,385.70
  5. Step 5: Solve for x
    x = 2,719,385.70/2,143.20
  6. Step 6: Final answer
    x = 1,268.85

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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.