Home / 3,019.80-4,529.60-939.79

Finding the Fourth Proportional to 3,019.80, 4,529.60 and 939.79

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Solution

The fourth proportional to 3,019.80, 4,529.60 and 939.79 is: 1,409.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,019.80 : 4,529.60 = 939.79 : x
  2. Step 2: Convert to fraction form
    3,019.80/4,529.60 = 939.79/x
  3. Step 3: Cross multiply
    3,019.80x = 4,529.60 × 939.79
  4. Step 4: Simplify right side
    3,019.80x = 4,256,872.78
  5. Step 5: Solve for x
    x = 4,256,872.78/3,019.80
  6. Step 6: Final answer
    x = 1,409.65

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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.