Home / 1,861.41-2,568.20-1,153.78

Finding the Fourth Proportional to 1,861.41, 2,568.20 and 1,153.78

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Solution

The fourth proportional to 1,861.41, 2,568.20 and 1,153.78 is: 1,591.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.41 : 2,568.20 = 1,153.78 : x
  2. Step 2: Convert to fraction form
    1,861.41/2,568.20 = 1,153.78/x
  3. Step 3: Cross multiply
    1,861.41x = 2,568.20 × 1,153.78
  4. Step 4: Simplify right side
    1,861.41x = 2,963,137.80
  5. Step 5: Solve for x
    x = 2,963,137.80/1,861.41
  6. Step 6: Final answer
    x = 1,591.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.