Home / 1,485.46-2,228.25-389.80

Finding the Fourth Proportional to 1,485.46, 2,228.25 and 389.80

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Solution

The fourth proportional to 1,485.46, 2,228.25 and 389.80 is: 584.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.46 : 2,228.25 = 389.80 : x
  2. Step 2: Convert to fraction form
    1,485.46/2,228.25 = 389.80/x
  3. Step 3: Cross multiply
    1,485.46x = 2,228.25 × 389.80
  4. Step 4: Simplify right side
    1,485.46x = 868,571.85
  5. Step 5: Solve for x
    x = 868,571.85/1,485.46
  6. Step 6: Final answer
    x = 584.72

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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.