Home / 3,856.28-5,785.78-1,259.20

Finding the Fourth Proportional to 3,856.28, 5,785.78 and 1,259.20

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Solution

The fourth proportional to 3,856.28, 5,785.78 and 1,259.20 is: 1,889.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.28 : 5,785.78 = 1,259.20 : x
  2. Step 2: Convert to fraction form
    3,856.28/5,785.78 = 1,259.20/x
  3. Step 3: Cross multiply
    3,856.28x = 5,785.78 × 1,259.20
  4. Step 4: Simplify right side
    3,856.28x = 7,285,454.18
  5. Step 5: Solve for x
    x = 7,285,454.18/3,856.28
  6. Step 6: Final answer
    x = 1,889.24

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1.5x scale

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.