Home / 3,428.12-5,142.11-1,119.62

Finding the Fourth Proportional to 3,428.12, 5,142.11 and 1,119.62

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Solution

The fourth proportional to 3,428.12, 5,142.11 and 1,119.62 is: 1,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.12 : 5,142.11 = 1,119.62 : x
  2. Step 2: Convert to fraction form
    3,428.12/5,142.11 = 1,119.62/x
  3. Step 3: Cross multiply
    3,428.12x = 5,142.11 × 1,119.62
  4. Step 4: Simplify right side
    3,428.12x = 5,757,177.89
  5. Step 5: Solve for x
    x = 5,757,177.89/3,428.12
  6. Step 6: Final answer
    x = 1,679.40

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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.