Home / 1,383,977.80-1,909,846.02-811,399.30

Finding the Fourth Proportional to 1,383,977.80, 1,909,846.02 and 811,399.30

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Solution

The fourth proportional to 1,383,977.80, 1,909,846.02 and 811,399.30 is: 1,119,705.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,977.80 : 1,909,846.02 = 811,399.30 : x
  2. Step 2: Convert to fraction form
    1,383,977.80/1,909,846.02 = 811,399.30/x
  3. Step 3: Cross multiply
    1,383,977.80x = 1,909,846.02 × 811,399.30
  4. Step 4: Simplify right side
    1,383,977.80x = 1,549,647,723,735.79
  5. Step 5: Solve for x
    x = 1,549,647,723,735.79/1,383,977.80
  6. Step 6: Final answer
    x = 1,119,705.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.