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Finding the Fourth Proportional to 2,847.12, 3,928.84 and 1,604.88

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Solution

The fourth proportional to 2,847.12, 3,928.84 and 1,604.88 is: 2,214.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.12 : 3,928.84 = 1,604.88 : x
  2. Step 2: Convert to fraction form
    2,847.12/3,928.84 = 1,604.88/x
  3. Step 3: Cross multiply
    2,847.12x = 3,928.84 × 1,604.88
  4. Step 4: Simplify right side
    2,847.12x = 6,305,316.74
  5. Step 5: Solve for x
    x = 6,305,316.74/2,847.12
  6. Step 6: Final answer
    x = 2,214.63

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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.