Home / 3,428.28-5,143.35-1,119.78

Finding the Fourth Proportional to 3,428.28, 5,143.35 and 1,119.78

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Solution

The fourth proportional to 3,428.28, 5,143.35 and 1,119.78 is: 1,679.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.28 : 5,143.35 = 1,119.78 : x
  2. Step 2: Convert to fraction form
    3,428.28/5,143.35 = 1,119.78/x
  3. Step 3: Cross multiply
    3,428.28x = 5,143.35 × 1,119.78
  4. Step 4: Simplify right side
    3,428.28x = 5,759,420.46
  5. Step 5: Solve for x
    x = 5,759,420.46/3,428.28
  6. Step 6: Final answer
    x = 1,679.97

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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.