Home / 2,291.31-3,161.99-1,296.80

Finding the Fourth Proportional to 2,291.31, 3,161.99 and 1,296.80

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Solution

The fourth proportional to 2,291.31, 3,161.99 and 1,296.80 is: 1,789.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,291.31 : 3,161.99 = 1,296.80 : x
  2. Step 2: Convert to fraction form
    2,291.31/3,161.99 = 1,296.80/x
  3. Step 3: Cross multiply
    2,291.31x = 3,161.99 × 1,296.80
  4. Step 4: Simplify right side
    2,291.31x = 4,100,446.34
  5. Step 5: Solve for x
    x = 4,100,446.34/2,291.31
  6. Step 6: Final answer
    x = 1,789.56

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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.