Home / 3,191.79-4,403.26-2,128.54

Finding the Fourth Proportional to 3,191.79, 4,403.26 and 2,128.54

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Solution

The fourth proportional to 3,191.79, 4,403.26 and 2,128.54 is: 2,936.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.79 : 4,403.26 = 2,128.54 : x
  2. Step 2: Convert to fraction form
    3,191.79/4,403.26 = 2,128.54/x
  3. Step 3: Cross multiply
    3,191.79x = 4,403.26 × 2,128.54
  4. Step 4: Simplify right side
    3,191.79x = 9,372,502.56
  5. Step 5: Solve for x
    x = 9,372,502.56/3,191.79
  6. Step 6: Final answer
    x = 2,936.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.