Home / 2,021.19-2,790.81-1,578.32

Finding the Fourth Proportional to 2,021.19, 2,790.81 and 1,578.32

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Solution

The fourth proportional to 2,021.19, 2,790.81 and 1,578.32 is: 2,179.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.19 : 2,790.81 = 1,578.32 : x
  2. Step 2: Convert to fraction form
    2,021.19/2,790.81 = 1,578.32/x
  3. Step 3: Cross multiply
    2,021.19x = 2,790.81 × 1,578.32
  4. Step 4: Simplify right side
    2,021.19x = 4,404,777.29
  5. Step 5: Solve for x
    x = 4,404,777.29/2,021.19
  6. Step 6: Final answer
    x = 2,179.30

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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.