Home / 2,275.62-3,139.34-1,391.26

Finding the Fourth Proportional to 2,275.62, 3,139.34 and 1,391.26

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Solution

The fourth proportional to 2,275.62, 3,139.34 and 1,391.26 is: 1,919.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.62 : 3,139.34 = 1,391.26 : x
  2. Step 2: Convert to fraction form
    2,275.62/3,139.34 = 1,391.26/x
  3. Step 3: Cross multiply
    2,275.62x = 3,139.34 × 1,391.26
  4. Step 4: Simplify right side
    2,275.62x = 4,367,623.36
  5. Step 5: Solve for x
    x = 4,367,623.36/2,275.62
  6. Step 6: Final answer
    x = 1,919.31

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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.