Home / 2,416.80-3,620.40-1,639.20

Finding the Fourth Proportional to 2,416.80, 3,620.40 and 1,639.20

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Solution

The fourth proportional to 2,416.80, 3,620.40 and 1,639.20 is: 2,455.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,416.80 : 3,620.40 = 1,639.20 : x
  2. Step 2: Convert to fraction form
    2,416.80/3,620.40 = 1,639.20/x
  3. Step 3: Cross multiply
    2,416.80x = 3,620.40 × 1,639.20
  4. Step 4: Simplify right side
    2,416.80x = 5,934,559.68
  5. Step 5: Solve for x
    x = 5,934,559.68/2,416.80
  6. Step 6: Final answer
    x = 2,455.54

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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.