Home / 2,857.75-4,288.65-1,126.78

Finding the Fourth Proportional to 2,857.75, 4,288.65 and 1,126.78

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Solution

The fourth proportional to 2,857.75, 4,288.65 and 1,126.78 is: 1,690.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.75 : 4,288.65 = 1,126.78 : x
  2. Step 2: Convert to fraction form
    2,857.75/4,288.65 = 1,126.78/x
  3. Step 3: Cross multiply
    2,857.75x = 4,288.65 × 1,126.78
  4. Step 4: Simplify right side
    2,857.75x = 4,832,365.05
  5. Step 5: Solve for x
    x = 4,832,365.05/2,857.75
  6. Step 6: Final answer
    x = 1,690.97

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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.