Home / 3,856.12-5,782.81-1,390.27

Finding the Fourth Proportional to 3,856.12, 5,782.81 and 1,390.27

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Solution

The fourth proportional to 3,856.12, 5,782.81 and 1,390.27 is: 2,084.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.12 : 5,782.81 = 1,390.27 : x
  2. Step 2: Convert to fraction form
    3,856.12/5,782.81 = 1,390.27/x
  3. Step 3: Cross multiply
    3,856.12x = 5,782.81 × 1,390.27
  4. Step 4: Simplify right side
    3,856.12x = 8,039,667.26
  5. Step 5: Solve for x
    x = 8,039,667.26/3,856.12
  6. Step 6: Final answer
    x = 2,084.91

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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.