Home / 3,391.20-5,090.40-1,933.20

Finding the Fourth Proportional to 3,391.20, 5,090.40 and 1,933.20

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Solution

The fourth proportional to 3,391.20, 5,090.40 and 1,933.20 is: 2,901.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.20 : 5,090.40 = 1,933.20 : x
  2. Step 2: Convert to fraction form
    3,391.20/5,090.40 = 1,933.20/x
  3. Step 3: Cross multiply
    3,391.20x = 5,090.40 × 1,933.20
  4. Step 4: Simplify right side
    3,391.20x = 9,840,761.28
  5. Step 5: Solve for x
    x = 9,840,761.28/3,391.20
  6. Step 6: Final answer
    x = 2,901.85

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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.