Home / 2,856.45-4,278.60-1,872.30

Finding the Fourth Proportional to 2,856.45, 4,278.60 and 1,872.30

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Solution

The fourth proportional to 2,856.45, 4,278.60 and 1,872.30 is: 2,804.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.45 : 4,278.60 = 1,872.30 : x
  2. Step 2: Convert to fraction form
    2,856.45/4,278.60 = 1,872.30/x
  3. Step 3: Cross multiply
    2,856.45x = 4,278.60 × 1,872.30
  4. Step 4: Simplify right side
    2,856.45x = 8,010,822.78
  5. Step 5: Solve for x
    x = 8,010,822.78/2,856.45
  6. Step 6: Final answer
    x = 2,804.47

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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.