Home / 1,481.07-2,221.60-1,390.86

Finding the Fourth Proportional to 1,481.07, 2,221.60 and 1,390.86

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Solution

The fourth proportional to 1,481.07, 2,221.60 and 1,390.86 is: 2,086.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,481.07 : 2,221.60 = 1,390.86 : x
  2. Step 2: Convert to fraction form
    1,481.07/2,221.60 = 1,390.86/x
  3. Step 3: Cross multiply
    1,481.07x = 2,221.60 × 1,390.86
  4. Step 4: Simplify right side
    1,481.07x = 3,089,934.58
  5. Step 5: Solve for x
    x = 3,089,934.58/1,481.07
  6. Step 6: Final answer
    x = 2,086.29

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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.