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Finding the Fourth Proportional to 2,991.90, 4,481.90 and 2,339.58

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Solution

The fourth proportional to 2,991.90, 4,481.90 and 2,339.58 is: 3,504.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.90 : 4,481.90 = 2,339.58 : x
  2. Step 2: Convert to fraction form
    2,991.90/4,481.90 = 2,339.58/x
  3. Step 3: Cross multiply
    2,991.90x = 4,481.90 × 2,339.58
  4. Step 4: Simplify right side
    2,991.90x = 10,485,763.60
  5. Step 5: Solve for x
    x = 10,485,763.60/2,991.90
  6. Step 6: Final answer
    x = 3,504.72

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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.