Home / 2,857.70-4,286.55-2,555.30

Finding the Fourth Proportional to 2,857.70, 4,286.55 and 2,555.30

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Solution

The fourth proportional to 2,857.70, 4,286.55 and 2,555.30 is: 3,832.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.70 : 4,286.55 = 2,555.30 : x
  2. Step 2: Convert to fraction form
    2,857.70/4,286.55 = 2,555.30/x
  3. Step 3: Cross multiply
    2,857.70x = 4,286.55 × 2,555.30
  4. Step 4: Simplify right side
    2,857.70x = 10,953,421.22
  5. Step 5: Solve for x
    x = 10,953,421.22/2,857.70
  6. Step 6: Final answer
    x = 3,832.95

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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.