Home / 2,239.87-3,090.80-1,245.05

Finding the Fourth Proportional to 2,239.87, 3,090.80 and 1,245.05

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Solution

The fourth proportional to 2,239.87, 3,090.80 and 1,245.05 is: 1,718.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,239.87 : 3,090.80 = 1,245.05 : x
  2. Step 2: Convert to fraction form
    2,239.87/3,090.80 = 1,245.05/x
  3. Step 3: Cross multiply
    2,239.87x = 3,090.80 × 1,245.05
  4. Step 4: Simplify right side
    2,239.87x = 3,848,190.45
  5. Step 5: Solve for x
    x = 3,848,190.45/2,239.87
  6. Step 6: Final answer
    x = 1,718.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.