Home / 3,391.80-5,091.21-1,638.06

Finding the Fourth Proportional to 3,391.80, 5,091.21 and 1,638.06

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Solution

The fourth proportional to 3,391.80, 5,091.21 and 1,638.06 is: 2,458.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.80 : 5,091.21 = 1,638.06 : x
  2. Step 2: Convert to fraction form
    3,391.80/5,091.21 = 1,638.06/x
  3. Step 3: Cross multiply
    3,391.80x = 5,091.21 × 1,638.06
  4. Step 4: Simplify right side
    3,391.80x = 8,339,707.45
  5. Step 5: Solve for x
    x = 8,339,707.45/3,391.80
  6. Step 6: Final answer
    x = 2,458.79

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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.