Home / 678,873.80-1,018,310.70-394,272.20

Finding the Fourth Proportional to 678,873.80, 1,018,310.70 and 394,272.20

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Solution

The fourth proportional to 678,873.80, 1,018,310.70 and 394,272.20 is: 591,408.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,873.80 : 1,018,310.70 = 394,272.20 : x
  2. Step 2: Convert to fraction form
    678,873.80/1,018,310.70 = 394,272.20/x
  3. Step 3: Cross multiply
    678,873.80x = 1,018,310.70 × 394,272.20
  4. Step 4: Simplify right side
    678,873.80x = 401,491,599,972.54
  5. Step 5: Solve for x
    x = 401,491,599,972.54/678,873.80
  6. Step 6: Final answer
    x = 591,408.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.