Home / 3,431.80-5,147.64-1,091.77

Finding the Fourth Proportional to 3,431.80, 5,147.64 and 1,091.77

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Solution

The fourth proportional to 3,431.80, 5,147.64 and 1,091.77 is: 1,637.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.80 : 5,147.64 = 1,091.77 : x
  2. Step 2: Convert to fraction form
    3,431.80/5,147.64 = 1,091.77/x
  3. Step 3: Cross multiply
    3,431.80x = 5,147.64 × 1,091.77
  4. Step 4: Simplify right side
    3,431.80x = 5,620,028.78
  5. Step 5: Solve for x
    x = 5,620,028.78/3,431.80
  6. Step 6: Final answer
    x = 1,637.63

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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.