Home / 2,778.32-3,829.64-2,179.84

Finding the Fourth Proportional to 2,778.32, 3,829.64 and 2,179.84

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Solution

The fourth proportional to 2,778.32, 3,829.64 and 2,179.84 is: 3,004.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.32 : 3,829.64 = 2,179.84 : x
  2. Step 2: Convert to fraction form
    2,778.32/3,829.64 = 2,179.84/x
  3. Step 3: Cross multiply
    2,778.32x = 3,829.64 × 2,179.84
  4. Step 4: Simplify right side
    2,778.32x = 8,348,002.46
  5. Step 5: Solve for x
    x = 8,348,002.46/2,778.32
  6. Step 6: Final answer
    x = 3,004.69

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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.