Home / 3,619.85-5,429.75-1,979.60

Finding the Fourth Proportional to 3,619.85, 5,429.75 and 1,979.60

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Solution

The fourth proportional to 3,619.85, 5,429.75 and 1,979.60 is: 2,969.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.85 : 5,429.75 = 1,979.60 : x
  2. Step 2: Convert to fraction form
    3,619.85/5,429.75 = 1,979.60/x
  3. Step 3: Cross multiply
    3,619.85x = 5,429.75 × 1,979.60
  4. Step 4: Simplify right side
    3,619.85x = 10,748,696.05
  5. Step 5: Solve for x
    x = 10,748,696.05/3,619.85
  6. Step 6: Final answer
    x = 2,969.38

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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.