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Finding the Fourth Proportional to 3,200.87, 4,800.37 and 1,120.49

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Solution

The fourth proportional to 3,200.87, 4,800.37 and 1,120.49 is: 1,680.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,200.87 : 4,800.37 = 1,120.49 : x
  2. Step 2: Convert to fraction form
    3,200.87/4,800.37 = 1,120.49/x
  3. Step 3: Cross multiply
    3,200.87x = 4,800.37 × 1,120.49
  4. Step 4: Simplify right side
    3,200.87x = 5,378,759.88
  5. Step 5: Solve for x
    x = 5,378,759.88/3,200.87
  6. Step 6: Final answer
    x = 1,680.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.