Home / 3,431.80-5,147.34-1,240.12

Finding the Fourth Proportional to 3,431.80, 5,147.34 and 1,240.12

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Solution

The fourth proportional to 3,431.80, 5,147.34 and 1,240.12 is: 1,860.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.80 : 5,147.34 = 1,240.12 : x
  2. Step 2: Convert to fraction form
    3,431.80/5,147.34 = 1,240.12/x
  3. Step 3: Cross multiply
    3,431.80x = 5,147.34 × 1,240.12
  4. Step 4: Simplify right side
    3,431.80x = 6,383,319.28
  5. Step 5: Solve for x
    x = 6,383,319.28/3,431.80
  6. Step 6: Final answer
    x = 1,860.05

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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.