Home / 3,777.80-5,215.20-2,519.60

Finding the Fourth Proportional to 3,777.80, 5,215.20 and 2,519.60

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Solution

The fourth proportional to 3,777.80, 5,215.20 and 2,519.60 is: 3,478.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,777.80 : 5,215.20 = 2,519.60 : x
  2. Step 2: Convert to fraction form
    3,777.80/5,215.20 = 2,519.60/x
  3. Step 3: Cross multiply
    3,777.80x = 5,215.20 × 2,519.60
  4. Step 4: Simplify right side
    3,777.80x = 13,140,217.92
  5. Step 5: Solve for x
    x = 13,140,217.92/3,777.80
  6. Step 6: Final answer
    x = 3,478.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.