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Finding the Fourth Proportional to 1,936.40, 2,902.80 and 1,351.40

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Solution

The fourth proportional to 1,936.40, 2,902.80 and 1,351.40 is: 2,025.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,936.40 : 2,902.80 = 1,351.40 : x
  2. Step 2: Convert to fraction form
    1,936.40/2,902.80 = 1,351.40/x
  3. Step 3: Cross multiply
    1,936.40x = 2,902.80 × 1,351.40
  4. Step 4: Simplify right side
    1,936.40x = 3,922,843.92
  5. Step 5: Solve for x
    x = 3,922,843.92/1,936.40
  6. Step 6: Final answer
    x = 2,025.84

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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.