Home / 2,856.70-4,285.50-1,213.25

Finding the Fourth Proportional to 2,856.70, 4,285.50 and 1,213.25

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Solution

The fourth proportional to 2,856.70, 4,285.50 and 1,213.25 is: 1,820.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.70 : 4,285.50 = 1,213.25 : x
  2. Step 2: Convert to fraction form
    2,856.70/4,285.50 = 1,213.25/x
  3. Step 3: Cross multiply
    2,856.70x = 4,285.50 × 1,213.25
  4. Step 4: Simplify right side
    2,856.70x = 5,199,376.81
  5. Step 5: Solve for x
    x = 5,199,376.81/2,856.70
  6. Step 6: Final answer
    x = 1,820.07

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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.