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Finding the Fourth Proportional to 2,739.62, 4,109.81 and 890.13

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Solution

The fourth proportional to 2,739.62, 4,109.81 and 890.13 is: 1,335.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.62 : 4,109.81 = 890.13 : x
  2. Step 2: Convert to fraction form
    2,739.62/4,109.81 = 890.13/x
  3. Step 3: Cross multiply
    2,739.62x = 4,109.81 × 890.13
  4. Step 4: Simplify right side
    2,739.62x = 3,658,260.72
  5. Step 5: Solve for x
    x = 3,658,260.72/2,739.62
  6. Step 6: Final answer
    x = 1,335.32

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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.