Home / 3,991.20-5,987.44-1,180.32

Finding the Fourth Proportional to 3,991.20, 5,987.44 and 1,180.32

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Solution

The fourth proportional to 3,991.20, 5,987.44 and 1,180.32 is: 1,770.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.20 : 5,987.44 = 1,180.32 : x
  2. Step 2: Convert to fraction form
    3,991.20/5,987.44 = 1,180.32/x
  3. Step 3: Cross multiply
    3,991.20x = 5,987.44 × 1,180.32
  4. Step 4: Simplify right side
    3,991.20x = 7,067,095.18
  5. Step 5: Solve for x
    x = 7,067,095.18/3,991.20
  6. Step 6: Final answer
    x = 1,770.67

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1.5x scale

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.