Home / 3,139.05-4,331.99-1,722.85

Finding the Fourth Proportional to 3,139.05, 4,331.99 and 1,722.85

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Solution

The fourth proportional to 3,139.05, 4,331.99 and 1,722.85 is: 2,377.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.05 : 4,331.99 = 1,722.85 : x
  2. Step 2: Convert to fraction form
    3,139.05/4,331.99 = 1,722.85/x
  3. Step 3: Cross multiply
    3,139.05x = 4,331.99 × 1,722.85
  4. Step 4: Simplify right side
    3,139.05x = 7,463,368.97
  5. Step 5: Solve for x
    x = 7,463,368.97/3,139.05
  6. Step 6: Final answer
    x = 2,377.59

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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.