Home / 2,778.12-3,836.16-1,785.60

Finding the Fourth Proportional to 2,778.12, 3,836.16 and 1,785.60

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Solution

The fourth proportional to 2,778.12, 3,836.16 and 1,785.60 is: 2,465.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.12 : 3,836.16 = 1,785.60 : x
  2. Step 2: Convert to fraction form
    2,778.12/3,836.16 = 1,785.60/x
  3. Step 3: Cross multiply
    2,778.12x = 3,836.16 × 1,785.60
  4. Step 4: Simplify right side
    2,778.12x = 6,849,847.30
  5. Step 5: Solve for x
    x = 6,849,847.30/2,778.12
  6. Step 6: Final answer
    x = 2,465.64

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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.