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Finding the Fourth Proportional to 3,960.20, 5,940.12 and 1,878.68

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Solution

The fourth proportional to 3,960.20, 5,940.12 and 1,878.68 is: 2,817.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.20 : 5,940.12 = 1,878.68 : x
  2. Step 2: Convert to fraction form
    3,960.20/5,940.12 = 1,878.68/x
  3. Step 3: Cross multiply
    3,960.20x = 5,940.12 × 1,878.68
  4. Step 4: Simplify right side
    3,960.20x = 11,159,584.64
  5. Step 5: Solve for x
    x = 11,159,584.64/3,960.20
  6. Step 6: Final answer
    x = 2,817.93

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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.