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Finding the Fourth Proportional to 3,316.40, 4,940.22 and 3,239.60

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Solution

The fourth proportional to 3,316.40, 4,940.22 and 3,239.60 is: 4,825.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,316.40 : 4,940.22 = 3,239.60 : x
  2. Step 2: Convert to fraction form
    3,316.40/4,940.22 = 3,239.60/x
  3. Step 3: Cross multiply
    3,316.40x = 4,940.22 × 3,239.60
  4. Step 4: Simplify right side
    3,316.40x = 16,004,336.71
  5. Step 5: Solve for x
    x = 16,004,336.71/3,316.40
  6. Step 6: Final answer
    x = 4,825.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.