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Finding the Fourth Proportional to 2,739.36, 4,107.60 and 890.04

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Solution

The fourth proportional to 2,739.36, 4,107.60 and 890.04 is: 1,334.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.36 : 4,107.60 = 890.04 : x
  2. Step 2: Convert to fraction form
    2,739.36/4,107.60 = 890.04/x
  3. Step 3: Cross multiply
    2,739.36x = 4,107.60 × 890.04
  4. Step 4: Simplify right side
    2,739.36x = 3,655,928.30
  5. Step 5: Solve for x
    x = 3,655,928.30/2,739.36
  6. Step 6: Final answer
    x = 1,334.59

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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.