Home / 2,857.28-4,286.19-1,125.50

Finding the Fourth Proportional to 2,857.28, 4,286.19 and 1,125.50

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Solution

The fourth proportional to 2,857.28, 4,286.19 and 1,125.50 is: 1,688.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.28 : 4,286.19 = 1,125.50 : x
  2. Step 2: Convert to fraction form
    2,857.28/4,286.19 = 1,125.50/x
  3. Step 3: Cross multiply
    2,857.28x = 4,286.19 × 1,125.50
  4. Step 4: Simplify right side
    2,857.28x = 4,824,106.85
  5. Step 5: Solve for x
    x = 4,824,106.85/2,857.28
  6. Step 6: Final answer
    x = 1,688.36

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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.