Home / 3,213.20-4,819.80-1,653.20

Finding the Fourth Proportional to 3,213.20, 4,819.80 and 1,653.20

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Solution

The fourth proportional to 3,213.20, 4,819.80 and 1,653.20 is: 2,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,213.20 : 4,819.80 = 1,653.20 : x
  2. Step 2: Convert to fraction form
    3,213.20/4,819.80 = 1,653.20/x
  3. Step 3: Cross multiply
    3,213.20x = 4,819.80 × 1,653.20
  4. Step 4: Simplify right side
    3,213.20x = 7,968,093.36
  5. Step 5: Solve for x
    x = 7,968,093.36/3,213.20
  6. Step 6: Final answer
    x = 2,479.80

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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.