Home / 2,856.46-4,278.61-1,685.20

Finding the Fourth Proportional to 2,856.46, 4,278.61 and 1,685.20

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Solution

The fourth proportional to 2,856.46, 4,278.61 and 1,685.20 is: 2,524.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.46 : 4,278.61 = 1,685.20 : x
  2. Step 2: Convert to fraction form
    2,856.46/4,278.61 = 1,685.20/x
  3. Step 3: Cross multiply
    2,856.46x = 4,278.61 × 1,685.20
  4. Step 4: Simplify right side
    2,856.46x = 7,210,304.98
  5. Step 5: Solve for x
    x = 7,210,304.98/2,856.46
  6. Step 6: Final answer
    x = 2,524.21

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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.