Home / 2,021.20-2,788.87-1,224.36

Finding the Fourth Proportional to 2,021.20, 2,788.87 and 1,224.36

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Solution

The fourth proportional to 2,021.20, 2,788.87 and 1,224.36 is: 1,689.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.20 : 2,788.87 = 1,224.36 : x
  2. Step 2: Convert to fraction form
    2,021.20/2,788.87 = 1,224.36/x
  3. Step 3: Cross multiply
    2,021.20x = 2,788.87 × 1,224.36
  4. Step 4: Simplify right side
    2,021.20x = 3,414,587.85
  5. Step 5: Solve for x
    x = 3,414,587.85/2,021.20
  6. Step 6: Final answer
    x = 1,689.39

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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.