Home / 681,143.58-939,977.79-394,829.58

Finding the Fourth Proportional to 681,143.58, 939,977.79 and 394,829.58

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Solution

The fourth proportional to 681,143.58, 939,977.79 and 394,829.58 is: 544,864.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,143.58 : 939,977.79 = 394,829.58 : x
  2. Step 2: Convert to fraction form
    681,143.58/939,977.79 = 394,829.58/x
  3. Step 3: Cross multiply
    681,143.58x = 939,977.79 × 394,829.58
  4. Step 4: Simplify right side
    681,143.58x = 371,131,036,035.03
  5. Step 5: Solve for x
    x = 371,131,036,035.03/681,143.58
  6. Step 6: Final answer
    x = 544,864.62

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1.5x scale

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.