Home / 2,815.43-3,884.36-1,620.09

Finding the Fourth Proportional to 2,815.43, 3,884.36 and 1,620.09

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Solution

The fourth proportional to 2,815.43, 3,884.36 and 1,620.09 is: 2,235.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.43 : 3,884.36 = 1,620.09 : x
  2. Step 2: Convert to fraction form
    2,815.43/3,884.36 = 1,620.09/x
  3. Step 3: Cross multiply
    2,815.43x = 3,884.36 × 1,620.09
  4. Step 4: Simplify right side
    2,815.43x = 6,293,004.69
  5. Step 5: Solve for x
    x = 6,293,004.69/2,815.43
  6. Step 6: Final answer
    x = 2,235.19

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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.