Home / 1,383,978.80-1,909,847.40-811,400.30

Finding the Fourth Proportional to 1,383,978.80, 1,909,847.40 and 811,400.30

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Solution

The fourth proportional to 1,383,978.80, 1,909,847.40 and 811,400.30 is: 1,119,707.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,978.80 : 1,909,847.40 = 811,400.30 : x
  2. Step 2: Convert to fraction form
    1,383,978.80/1,909,847.40 = 811,400.30/x
  3. Step 3: Cross multiply
    1,383,978.80x = 1,909,847.40 × 811,400.30
  4. Step 4: Simplify right side
    1,383,978.80x = 1,549,650,753,314.22
  5. Step 5: Solve for x
    x = 1,549,650,753,314.22/1,383,978.80
  6. Step 6: Final answer
    x = 1,119,707.00

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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.