Home / 3,078.50-4,247.64-1,819.60

Finding the Fourth Proportional to 3,078.50, 4,247.64 and 1,819.60

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Solution

The fourth proportional to 3,078.50, 4,247.64 and 1,819.60 is: 2,510.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.50 : 4,247.64 = 1,819.60 : x
  2. Step 2: Convert to fraction form
    3,078.50/4,247.64 = 1,819.60/x
  3. Step 3: Cross multiply
    3,078.50x = 4,247.64 × 1,819.60
  4. Step 4: Simplify right side
    3,078.50x = 7,728,995.12
  5. Step 5: Solve for x
    x = 7,728,995.12/3,078.50
  6. Step 6: Final answer
    x = 2,510.64

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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.