Home / 1,287,080.80-1,930,611.60-388,520.80

Finding the Fourth Proportional to 1,287,080.80, 1,930,611.60 and 388,520.80

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Solution

The fourth proportional to 1,287,080.80, 1,930,611.60 and 388,520.80 is: 582,778.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,080.80 : 1,930,611.60 = 388,520.80 : x
  2. Step 2: Convert to fraction form
    1,287,080.80/1,930,611.60 = 388,520.80/x
  3. Step 3: Cross multiply
    1,287,080.80x = 1,930,611.60 × 388,520.80
  4. Step 4: Simplify right side
    1,287,080.80x = 750,082,763,321.28
  5. Step 5: Solve for x
    x = 750,082,763,321.28/1,287,080.80
  6. Step 6: Final answer
    x = 582,778.30

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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.