Home / 3,670.45-5,065.20-1,991.88

Finding the Fourth Proportional to 3,670.45, 5,065.20 and 1,991.88

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Solution

The fourth proportional to 3,670.45, 5,065.20 and 1,991.88 is: 2,748.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,670.45 : 5,065.20 = 1,991.88 : x
  2. Step 2: Convert to fraction form
    3,670.45/5,065.20 = 1,991.88/x
  3. Step 3: Cross multiply
    3,670.45x = 5,065.20 × 1,991.88
  4. Step 4: Simplify right side
    3,670.45x = 10,089,270.58
  5. Step 5: Solve for x
    x = 10,089,270.58/3,670.45
  6. Step 6: Final answer
    x = 2,748.78

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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.