Home / 2,135.76-2,944.68-1,388.64

Finding the Fourth Proportional to 2,135.76, 2,944.68 and 1,388.64

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Solution

The fourth proportional to 2,135.76, 2,944.68 and 1,388.64 is: 1,914.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.76 : 2,944.68 = 1,388.64 : x
  2. Step 2: Convert to fraction form
    2,135.76/2,944.68 = 1,388.64/x
  3. Step 3: Cross multiply
    2,135.76x = 2,944.68 × 1,388.64
  4. Step 4: Simplify right side
    2,135.76x = 4,089,100.44
  5. Step 5: Solve for x
    x = 4,089,100.44/2,135.76
  6. Step 6: Final answer
    x = 1,914.59

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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.