Home / 1,383,995.20-1,909,927.20-811,374.40

Finding the Fourth Proportional to 1,383,995.20, 1,909,927.20 and 811,374.40

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Solution

The fourth proportional to 1,383,995.20, 1,909,927.20 and 811,374.40 is: 1,119,704.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,995.20 : 1,909,927.20 = 811,374.40 : x
  2. Step 2: Convert to fraction form
    1,383,995.20/1,909,927.20 = 811,374.40/x
  3. Step 3: Cross multiply
    1,383,995.20x = 1,909,927.20 × 811,374.40
  4. Step 4: Simplify right side
    1,383,995.20x = 1,549,666,035,943.68
  5. Step 5: Solve for x
    x = 1,549,666,035,943.68/1,383,995.20
  6. Step 6: Final answer
    x = 1,119,704.78

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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.