Home / 1,939.41-2,903.79-1,355

Finding the Fourth Proportional to 1,939.41, 2,903.79 and 1,355

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Solution

The fourth proportional to 1,939.41, 2,903.79 and 1,355 is: 2,028.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.41 : 2,903.79 = 1,355 : x
  2. Step 2: Convert to fraction form
    1,939.41/2,903.79 = 1,355/x
  3. Step 3: Cross multiply
    1,939.41x = 2,903.79 × 1,355
  4. Step 4: Simplify right side
    1,939.41x = 3,934,635.45
  5. Step 5: Solve for x
    x = 3,934,635.45/1,939.41
  6. Step 6: Final answer
    x = 2,028.78

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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.