Home / 3,428.19-5,142.29-1,236.87

Finding the Fourth Proportional to 3,428.19, 5,142.29 and 1,236.87

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Solution

The fourth proportional to 3,428.19, 5,142.29 and 1,236.87 is: 1,855.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.19 : 5,142.29 = 1,236.87 : x
  2. Step 2: Convert to fraction form
    3,428.19/5,142.29 = 1,236.87/x
  3. Step 3: Cross multiply
    3,428.19x = 5,142.29 × 1,236.87
  4. Step 4: Simplify right side
    3,428.19x = 6,360,338.05
  5. Step 5: Solve for x
    x = 6,360,338.05/3,428.19
  6. Step 6: Final answer
    x = 1,855.31

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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.