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Finding the Fourth Proportional to 2,739.29, 4,107.86 and 889.95

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Solution

The fourth proportional to 2,739.29, 4,107.86 and 889.95 is: 1,334.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.29 : 4,107.86 = 889.95 : x
  2. Step 2: Convert to fraction form
    2,739.29/4,107.86 = 889.95/x
  3. Step 3: Cross multiply
    2,739.29x = 4,107.86 × 889.95
  4. Step 4: Simplify right side
    2,739.29x = 3,655,785.56
  5. Step 5: Solve for x
    x = 3,655,785.56/2,739.29
  6. Step 6: Final answer
    x = 1,334.58

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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.