Home / 3,038.80-4,190.76-1,991.44

Finding the Fourth Proportional to 3,038.80, 4,190.76 and 1,991.44

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Solution

The fourth proportional to 3,038.80, 4,190.76 and 1,991.44 is: 2,746.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,038.80 : 4,190.76 = 1,991.44 : x
  2. Step 2: Convert to fraction form
    3,038.80/4,190.76 = 1,991.44/x
  3. Step 3: Cross multiply
    3,038.80x = 4,190.76 × 1,991.44
  4. Step 4: Simplify right side
    3,038.80x = 8,345,647.09
  5. Step 5: Solve for x
    x = 8,345,647.09/3,038.80
  6. Step 6: Final answer
    x = 2,746.36

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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.