Home / 2,555.11-3,827.94-1,321.21

Finding the Fourth Proportional to 2,555.11, 3,827.94 and 1,321.21

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Solution

The fourth proportional to 2,555.11, 3,827.94 and 1,321.21 is: 1,979.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,555.11 : 3,827.94 = 1,321.21 : x
  2. Step 2: Convert to fraction form
    2,555.11/3,827.94 = 1,321.21/x
  3. Step 3: Cross multiply
    2,555.11x = 3,827.94 × 1,321.21
  4. Step 4: Simplify right side
    2,555.11x = 5,057,512.61
  5. Step 5: Solve for x
    x = 5,057,512.61/2,555.11
  6. Step 6: Final answer
    x = 1,979.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.