Home / 3,315.20-4,965.60-2,148.80

Finding the Fourth Proportional to 3,315.20, 4,965.60 and 2,148.80

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Solution

The fourth proportional to 3,315.20, 4,965.60 and 2,148.80 is: 3,218.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.20 : 4,965.60 = 2,148.80 : x
  2. Step 2: Convert to fraction form
    3,315.20/4,965.60 = 2,148.80/x
  3. Step 3: Cross multiply
    3,315.20x = 4,965.60 × 2,148.80
  4. Step 4: Simplify right side
    3,315.20x = 10,670,081.28
  5. Step 5: Solve for x
    x = 10,670,081.28/3,315.20
  6. Step 6: Final answer
    x = 3,218.53

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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.