Home / 1,940.40-2,679.30-1,551.60

Finding the Fourth Proportional to 1,940.40, 2,679.30 and 1,551.60

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Solution

The fourth proportional to 1,940.40, 2,679.30 and 1,551.60 is: 2,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,940.40 : 2,679.30 = 1,551.60 : x
  2. Step 2: Convert to fraction form
    1,940.40/2,679.30 = 1,551.60/x
  3. Step 3: Cross multiply
    1,940.40x = 2,679.30 × 1,551.60
  4. Step 4: Simplify right side
    1,940.40x = 4,157,201.88
  5. Step 5: Solve for x
    x = 4,157,201.88/1,940.40
  6. Step 6: Final answer
    x = 2,142.45

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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.