Home / 1,939.45-2,910.66-1,420.81

Finding the Fourth Proportional to 1,939.45, 2,910.66 and 1,420.81

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Solution

The fourth proportional to 1,939.45, 2,910.66 and 1,420.81 is: 2,132.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.45 : 2,910.66 = 1,420.81 : x
  2. Step 2: Convert to fraction form
    1,939.45/2,910.66 = 1,420.81/x
  3. Step 3: Cross multiply
    1,939.45x = 2,910.66 × 1,420.81
  4. Step 4: Simplify right side
    1,939.45x = 4,135,494.83
  5. Step 5: Solve for x
    x = 4,135,494.83/1,939.45
  6. Step 6: Final answer
    x = 2,132.30

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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.