Home / 3,180.32-4,771.42-989.36

Finding the Fourth Proportional to 3,180.32, 4,771.42 and 989.36

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Solution

The fourth proportional to 3,180.32, 4,771.42 and 989.36 is: 1,484.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.32 : 4,771.42 = 989.36 : x
  2. Step 2: Convert to fraction form
    3,180.32/4,771.42 = 989.36/x
  3. Step 3: Cross multiply
    3,180.32x = 4,771.42 × 989.36
  4. Step 4: Simplify right side
    3,180.32x = 4,720,652.09
  5. Step 5: Solve for x
    x = 4,720,652.09/3,180.32
  6. Step 6: Final answer
    x = 1,484.33

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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.