Home / 2,121.96-2,928.27-1,177.75

Finding the Fourth Proportional to 2,121.96, 2,928.27 and 1,177.75

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Solution

The fourth proportional to 2,121.96, 2,928.27 and 1,177.75 is: 1,625.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.96 : 2,928.27 = 1,177.75 : x
  2. Step 2: Convert to fraction form
    2,121.96/2,928.27 = 1,177.75/x
  3. Step 3: Cross multiply
    2,121.96x = 2,928.27 × 1,177.75
  4. Step 4: Simplify right side
    2,121.96x = 3,448,769.99
  5. Step 5: Solve for x
    x = 3,448,769.99/2,121.96
  6. Step 6: Final answer
    x = 1,625.28

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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.