Home / 2,143.05-3,212.64-845.43

Finding the Fourth Proportional to 2,143.05, 3,212.64 and 845.43

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Solution

The fourth proportional to 2,143.05, 3,212.64 and 845.43 is: 1,267.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.05 : 3,212.64 = 845.43 : x
  2. Step 2: Convert to fraction form
    2,143.05/3,212.64 = 845.43/x
  3. Step 3: Cross multiply
    2,143.05x = 3,212.64 × 845.43
  4. Step 4: Simplify right side
    2,143.05x = 2,716,062.24
  5. Step 5: Solve for x
    x = 2,716,062.24/2,143.05
  6. Step 6: Final answer
    x = 1,267.38

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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.