Home / 5,181.20-7,772.80-2,219.60

Finding the Fourth Proportional to 5,181.20, 7,772.80 and 2,219.60

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Solution

The fourth proportional to 5,181.20, 7,772.80 and 2,219.60 is: 3,329.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.20 : 7,772.80 = 2,219.60 : x
  2. Step 2: Convert to fraction form
    5,181.20/7,772.80 = 2,219.60/x
  3. Step 3: Cross multiply
    5,181.20x = 7,772.80 × 2,219.60
  4. Step 4: Simplify right side
    5,181.20x = 17,252,506.88
  5. Step 5: Solve for x
    x = 17,252,506.88/5,181.20
  6. Step 6: Final answer
    x = 3,329.83

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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.