Home / 3,128.45-4,694.49-1,485.77

Finding the Fourth Proportional to 3,128.45, 4,694.49 and 1,485.77

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Solution

The fourth proportional to 3,128.45, 4,694.49 and 1,485.77 is: 2,229.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.45 : 4,694.49 = 1,485.77 : x
  2. Step 2: Convert to fraction form
    3,128.45/4,694.49 = 1,485.77/x
  3. Step 3: Cross multiply
    3,128.45x = 4,694.49 × 1,485.77
  4. Step 4: Simplify right side
    3,128.45x = 6,974,908.93
  5. Step 5: Solve for x
    x = 6,974,908.93/3,128.45
  6. Step 6: Final answer
    x = 2,229.51

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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.