Home / 2,275.26-3,138.80-1,331.08

Finding the Fourth Proportional to 2,275.26, 3,138.80 and 1,331.08

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Solution

The fourth proportional to 2,275.26, 3,138.80 and 1,331.08 is: 1,836.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.26 : 3,138.80 = 1,331.08 : x
  2. Step 2: Convert to fraction form
    2,275.26/3,138.80 = 1,331.08/x
  3. Step 3: Cross multiply
    2,275.26x = 3,138.80 × 1,331.08
  4. Step 4: Simplify right side
    2,275.26x = 4,177,993.90
  5. Step 5: Solve for x
    x = 4,177,993.90/2,275.26
  6. Step 6: Final answer
    x = 1,836.27

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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.