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Finding the Fourth Proportional to 3,912.39, 5,397.39 and 2,340.45

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Solution

The fourth proportional to 3,912.39, 5,397.39 and 2,340.45 is: 3,228.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.39 : 5,397.39 = 2,340.45 : x
  2. Step 2: Convert to fraction form
    3,912.39/5,397.39 = 2,340.45/x
  3. Step 3: Cross multiply
    3,912.39x = 5,397.39 × 2,340.45
  4. Step 4: Simplify right side
    3,912.39x = 12,632,321.43
  5. Step 5: Solve for x
    x = 12,632,321.43/3,912.39
  6. Step 6: Final answer
    x = 3,228.80

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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.