Home / 2,122.36-2,928.81-1,238.26

Finding the Fourth Proportional to 2,122.36, 2,928.81 and 1,238.26

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Solution

The fourth proportional to 2,122.36, 2,928.81 and 1,238.26 is: 1,708.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.36 : 2,928.81 = 1,238.26 : x
  2. Step 2: Convert to fraction form
    2,122.36/2,928.81 = 1,238.26/x
  3. Step 3: Cross multiply
    2,122.36x = 2,928.81 × 1,238.26
  4. Step 4: Simplify right side
    2,122.36x = 3,626,628.27
  5. Step 5: Solve for x
    x = 3,626,628.27/2,122.36
  6. Step 6: Final answer
    x = 1,708.77

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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.