Home / 2,121.99-2,928.37-1,282.54

Finding the Fourth Proportional to 2,121.99, 2,928.37 and 1,282.54

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Solution

The fourth proportional to 2,121.99, 2,928.37 and 1,282.54 is: 1,769.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.99 : 2,928.37 = 1,282.54 : x
  2. Step 2: Convert to fraction form
    2,121.99/2,928.37 = 1,282.54/x
  3. Step 3: Cross multiply
    2,121.99x = 2,928.37 × 1,282.54
  4. Step 4: Simplify right side
    2,121.99x = 3,755,760.13
  5. Step 5: Solve for x
    x = 3,755,760.13/2,121.99
  6. Step 6: Final answer
    x = 1,769.93

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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.