Home / 3,078.28-4,249.65-1,819.72

Finding the Fourth Proportional to 3,078.28, 4,249.65 and 1,819.72

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Solution

The fourth proportional to 3,078.28, 4,249.65 and 1,819.72 is: 2,512.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.28 : 4,249.65 = 1,819.72 : x
  2. Step 2: Convert to fraction form
    3,078.28/4,249.65 = 1,819.72/x
  3. Step 3: Cross multiply
    3,078.28x = 4,249.65 × 1,819.72
  4. Step 4: Simplify right side
    3,078.28x = 7,733,173.10
  5. Step 5: Solve for x
    x = 7,733,173.10/3,078.28
  6. Step 6: Final answer
    x = 2,512.17

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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.