Home / 3,816.40-5,724.78-1,219.12

Finding the Fourth Proportional to 3,816.40, 5,724.78 and 1,219.12

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Solution

The fourth proportional to 3,816.40, 5,724.78 and 1,219.12 is: 1,828.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,816.40 : 5,724.78 = 1,219.12 : x
  2. Step 2: Convert to fraction form
    3,816.40/5,724.78 = 1,219.12/x
  3. Step 3: Cross multiply
    3,816.40x = 5,724.78 × 1,219.12
  4. Step 4: Simplify right side
    3,816.40x = 6,979,193.79
  5. Step 5: Solve for x
    x = 6,979,193.79/3,816.40
  6. Step 6: Final answer
    x = 1,828.74

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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.