Home / 3,790.78-5,230.94-2,111.92

Finding the Fourth Proportional to 3,790.78, 5,230.94 and 2,111.92

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Solution

The fourth proportional to 3,790.78, 5,230.94 and 2,111.92 is: 2,914.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,790.78 : 5,230.94 = 2,111.92 : x
  2. Step 2: Convert to fraction form
    3,790.78/5,230.94 = 2,111.92/x
  3. Step 3: Cross multiply
    3,790.78x = 5,230.94 × 2,111.92
  4. Step 4: Simplify right side
    3,790.78x = 11,047,326.80
  5. Step 5: Solve for x
    x = 11,047,326.80/3,790.78
  6. Step 6: Final answer
    x = 2,914.26

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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.