Home / 2,120.36-3,180.56-659.48

Finding the Fourth Proportional to 2,120.36, 3,180.56 and 659.48

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Solution

The fourth proportional to 2,120.36, 3,180.56 and 659.48 is: 989.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.36 : 3,180.56 = 659.48 : x
  2. Step 2: Convert to fraction form
    2,120.36/3,180.56 = 659.48/x
  3. Step 3: Cross multiply
    2,120.36x = 3,180.56 × 659.48
  4. Step 4: Simplify right side
    2,120.36x = 2,097,515.71
  5. Step 5: Solve for x
    x = 2,097,515.71/2,120.36
  6. Step 6: Final answer
    x = 989.23

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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.