Home / 3,139.09-4,331.91-1,722.79

Finding the Fourth Proportional to 3,139.09, 4,331.91 and 1,722.79

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Solution

The fourth proportional to 3,139.09, 4,331.91 and 1,722.79 is: 2,377.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.09 : 4,331.91 = 1,722.79 : x
  2. Step 2: Convert to fraction form
    3,139.09/4,331.91 = 1,722.79/x
  3. Step 3: Cross multiply
    3,139.09x = 4,331.91 × 1,722.79
  4. Step 4: Simplify right side
    3,139.09x = 7,462,940.96
  5. Step 5: Solve for x
    x = 7,462,940.96/3,139.09
  6. Step 6: Final answer
    x = 2,377.43

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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.