Home / 2,142.85-3,216.11-845.23

Finding the Fourth Proportional to 2,142.85, 3,216.11 and 845.23

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Solution

The fourth proportional to 2,142.85, 3,216.11 and 845.23 is: 1,268.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.85 : 3,216.11 = 845.23 : x
  2. Step 2: Convert to fraction form
    2,142.85/3,216.11 = 845.23/x
  3. Step 3: Cross multiply
    2,142.85x = 3,216.11 × 845.23
  4. Step 4: Simplify right side
    2,142.85x = 2,718,356.47
  5. Step 5: Solve for x
    x = 2,718,356.47/2,142.85
  6. Step 6: Final answer
    x = 1,268.57

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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.