Home / 1,804.20-2,704.68-939.12

Finding the Fourth Proportional to 1,804.20, 2,704.68 and 939.12

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Solution

The fourth proportional to 1,804.20, 2,704.68 and 939.12 is: 1,407.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,804.20 : 2,704.68 = 939.12 : x
  2. Step 2: Convert to fraction form
    1,804.20/2,704.68 = 939.12/x
  3. Step 3: Cross multiply
    1,804.20x = 2,704.68 × 939.12
  4. Step 4: Simplify right side
    1,804.20x = 2,540,019.08
  5. Step 5: Solve for x
    x = 2,540,019.08/1,804.20
  6. Step 6: Final answer
    x = 1,407.84

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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.