Home / 2,231.25-3,078.82-1,236.40

Finding the Fourth Proportional to 2,231.25, 3,078.82 and 1,236.40

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Solution

The fourth proportional to 2,231.25, 3,078.82 and 1,236.40 is: 1,706.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.25 : 3,078.82 = 1,236.40 : x
  2. Step 2: Convert to fraction form
    2,231.25/3,078.82 = 1,236.40/x
  3. Step 3: Cross multiply
    2,231.25x = 3,078.82 × 1,236.40
  4. Step 4: Simplify right side
    2,231.25x = 3,806,637.65
  5. Step 5: Solve for x
    x = 3,806,637.65/2,231.25
  6. Step 6: Final answer
    x = 1,706.06

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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.