Home / 1,389,021.80-2,080,255.90-858,180.20

Finding the Fourth Proportional to 1,389,021.80, 2,080,255.90 and 858,180.20

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Solution

The fourth proportional to 1,389,021.80, 2,080,255.90 and 858,180.20 is: 1,285,245.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,021.80 : 2,080,255.90 = 858,180.20 : x
  2. Step 2: Convert to fraction form
    1,389,021.80/2,080,255.90 = 858,180.20/x
  3. Step 3: Cross multiply
    1,389,021.80x = 2,080,255.90 × 858,180.20
  4. Step 4: Simplify right side
    1,389,021.80x = 1,785,234,424,313.18
  5. Step 5: Solve for x
    x = 1,785,234,424,313.18/1,389,021.80
  6. Step 6: Final answer
    x = 1,285,245.79

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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.