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Finding the Fourth Proportional to 3,960.40, 5,940.60 and 3,403.60

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Solution

The fourth proportional to 3,960.40, 5,940.60 and 3,403.60 is: 5,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.40 : 5,940.60 = 3,403.60 : x
  2. Step 2: Convert to fraction form
    3,960.40/5,940.60 = 3,403.60/x
  3. Step 3: Cross multiply
    3,960.40x = 5,940.60 × 3,403.60
  4. Step 4: Simplify right side
    3,960.40x = 20,219,426.16
  5. Step 5: Solve for x
    x = 20,219,426.16/3,960.40
  6. Step 6: Final answer
    x = 5,105.40

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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.