Home / 3,428.64-5,143.20-1,119.36

Finding the Fourth Proportional to 3,428.64, 5,143.20 and 1,119.36

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Solution

The fourth proportional to 3,428.64, 5,143.20 and 1,119.36 is: 1,679.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.64 : 5,143.20 = 1,119.36 : x
  2. Step 2: Convert to fraction form
    3,428.64/5,143.20 = 1,119.36/x
  3. Step 3: Cross multiply
    3,428.64x = 5,143.20 × 1,119.36
  4. Step 4: Simplify right side
    3,428.64x = 5,757,092.35
  5. Step 5: Solve for x
    x = 5,757,092.35/3,428.64
  6. Step 6: Final answer
    x = 1,679.12

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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.