Home / 3,431.25-5,147.15-1,122.75

Finding the Fourth Proportional to 3,431.25, 5,147.15 and 1,122.75

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Solution

The fourth proportional to 3,431.25, 5,147.15 and 1,122.75 is: 1,684.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.25 : 5,147.15 = 1,122.75 : x
  2. Step 2: Convert to fraction form
    3,431.25/5,147.15 = 1,122.75/x
  3. Step 3: Cross multiply
    3,431.25x = 5,147.15 × 1,122.75
  4. Step 4: Simplify right side
    3,431.25x = 5,778,957.05
  5. Step 5: Solve for x
    x = 5,778,957.05/3,431.25
  6. Step 6: Final answer
    x = 1,684.21

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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.