Home / 3,619.32-5,429.66-1,428.07

Finding the Fourth Proportional to 3,619.32, 5,429.66 and 1,428.07

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Solution

The fourth proportional to 3,619.32, 5,429.66 and 1,428.07 is: 2,142.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.32 : 5,429.66 = 1,428.07 : x
  2. Step 2: Convert to fraction form
    3,619.32/5,429.66 = 1,428.07/x
  3. Step 3: Cross multiply
    3,619.32x = 5,429.66 × 1,428.07
  4. Step 4: Simplify right side
    3,619.32x = 7,753,934.56
  5. Step 5: Solve for x
    x = 7,753,934.56/3,619.32
  6. Step 6: Final answer
    x = 2,142.37

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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.