Home / 3,389.79-4,676.36-1,991.55

Finding the Fourth Proportional to 3,389.79, 4,676.36 and 1,991.55

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Solution

The fourth proportional to 3,389.79, 4,676.36 and 1,991.55 is: 2,747.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,389.79 : 4,676.36 = 1,991.55 : x
  2. Step 2: Convert to fraction form
    3,389.79/4,676.36 = 1,991.55/x
  3. Step 3: Cross multiply
    3,389.79x = 4,676.36 × 1,991.55
  4. Step 4: Simplify right side
    3,389.79x = 9,313,194.80
  5. Step 5: Solve for x
    x = 9,313,194.80/3,389.79
  6. Step 6: Final answer
    x = 2,747.43

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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.