Home / 1,383,994.27-1,909,868.79-811,415.80

Finding the Fourth Proportional to 1,383,994.27, 1,909,868.79 and 811,415.80

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Solution

The fourth proportional to 1,383,994.27, 1,909,868.79 and 811,415.80 is: 1,119,728.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,994.27 : 1,909,868.79 = 811,415.80 : x
  2. Step 2: Convert to fraction form
    1,383,994.27/1,909,868.79 = 811,415.80/x
  3. Step 3: Cross multiply
    1,383,994.27x = 1,909,868.79 × 811,415.80
  4. Step 4: Simplify right side
    1,383,994.27x = 1,549,697,712,132.88
  5. Step 5: Solve for x
    x = 1,549,697,712,132.88/1,383,994.27
  6. Step 6: Final answer
    x = 1,119,728.42

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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.