Home / 2,021.77-2,790.78-1,276.21

Finding the Fourth Proportional to 2,021.77, 2,790.78 and 1,276.21

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Solution

The fourth proportional to 2,021.77, 2,790.78 and 1,276.21 is: 1,761.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.77 : 2,790.78 = 1,276.21 : x
  2. Step 2: Convert to fraction form
    2,021.77/2,790.78 = 1,276.21/x
  3. Step 3: Cross multiply
    2,021.77x = 2,790.78 × 1,276.21
  4. Step 4: Simplify right side
    2,021.77x = 3,561,621.34
  5. Step 5: Solve for x
    x = 3,561,621.34/2,021.77
  6. Step 6: Final answer
    x = 1,761.64

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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.