Home / 2,857.30-3,938.37-1,912.77

Finding the Fourth Proportional to 2,857.30, 3,938.37 and 1,912.77

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Solution

The fourth proportional to 2,857.30, 3,938.37 and 1,912.77 is: 2,636.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.30 : 3,938.37 = 1,912.77 : x
  2. Step 2: Convert to fraction form
    2,857.30/3,938.37 = 1,912.77/x
  3. Step 3: Cross multiply
    2,857.30x = 3,938.37 × 1,912.77
  4. Step 4: Simplify right side
    2,857.30x = 7,533,195.98
  5. Step 5: Solve for x
    x = 7,533,195.98/2,857.30
  6. Step 6: Final answer
    x = 2,636.47

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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.