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Finding the Fourth Proportional to 2,739.16, 4,107.74 and 889.80

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Solution

The fourth proportional to 2,739.16, 4,107.74 and 889.80 is: 1,334.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.16 : 4,107.74 = 889.80 : x
  2. Step 2: Convert to fraction form
    2,739.16/4,107.74 = 889.80/x
  3. Step 3: Cross multiply
    2,739.16x = 4,107.74 × 889.80
  4. Step 4: Simplify right side
    2,739.16x = 3,655,067.05
  5. Step 5: Solve for x
    x = 3,655,067.05/2,739.16
  6. Step 6: Final answer
    x = 1,334.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.