Home / 2,621.80-3,942.30-2,199.40

Finding the Fourth Proportional to 2,621.80, 3,942.30 and 2,199.40

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Solution

The fourth proportional to 2,621.80, 3,942.30 and 2,199.40 is: 3,307.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.80 : 3,942.30 = 2,199.40 : x
  2. Step 2: Convert to fraction form
    2,621.80/3,942.30 = 2,199.40/x
  3. Step 3: Cross multiply
    2,621.80x = 3,942.30 × 2,199.40
  4. Step 4: Simplify right side
    2,621.80x = 8,670,694.62
  5. Step 5: Solve for x
    x = 8,670,694.62/2,621.80
  6. Step 6: Final answer
    x = 3,307.15

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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.