Home / 3,811.80-5,715.36-1,619.28

Finding the Fourth Proportional to 3,811.80, 5,715.36 and 1,619.28

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Solution

The fourth proportional to 3,811.80, 5,715.36 and 1,619.28 is: 2,427.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.80 : 5,715.36 = 1,619.28 : x
  2. Step 2: Convert to fraction form
    3,811.80/5,715.36 = 1,619.28/x
  3. Step 3: Cross multiply
    3,811.80x = 5,715.36 × 1,619.28
  4. Step 4: Simplify right side
    3,811.80x = 9,254,768.14
  5. Step 5: Solve for x
    x = 9,254,768.14/3,811.80
  6. Step 6: Final answer
    x = 2,427.93

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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.