Home / 3,454.40-5,181.60-1,992.80

Finding the Fourth Proportional to 3,454.40, 5,181.60 and 1,992.80

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Solution

The fourth proportional to 3,454.40, 5,181.60 and 1,992.80 is: 2,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,454.40 : 5,181.60 = 1,992.80 : x
  2. Step 2: Convert to fraction form
    3,454.40/5,181.60 = 1,992.80/x
  3. Step 3: Cross multiply
    3,454.40x = 5,181.60 × 1,992.80
  4. Step 4: Simplify right side
    3,454.40x = 10,325,892.48
  5. Step 5: Solve for x
    x = 10,325,892.48/3,454.40
  6. Step 6: Final answer
    x = 2,989.20

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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.