Home / 2,857.56-3,942.60-1,809.36

Finding the Fourth Proportional to 2,857.56, 3,942.60 and 1,809.36

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Solution

The fourth proportional to 2,857.56, 3,942.60 and 1,809.36 is: 2,496.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.56 : 3,942.60 = 1,809.36 : x
  2. Step 2: Convert to fraction form
    2,857.56/3,942.60 = 1,809.36/x
  3. Step 3: Cross multiply
    2,857.56x = 3,942.60 × 1,809.36
  4. Step 4: Simplify right side
    2,857.56x = 7,133,582.74
  5. Step 5: Solve for x
    x = 7,133,582.74/2,857.56
  6. Step 6: Final answer
    x = 2,496.39

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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.