Home / 678,491.60-1,017,067.80-379,115.60

Finding the Fourth Proportional to 678,491.60, 1,017,067.80 and 379,115.60

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Solution

The fourth proportional to 678,491.60, 1,017,067.80 and 379,115.60 is: 568,299.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,491.60 : 1,017,067.80 = 379,115.60 : x
  2. Step 2: Convert to fraction form
    678,491.60/1,017,067.80 = 379,115.60/x
  3. Step 3: Cross multiply
    678,491.60x = 1,017,067.80 × 379,115.60
  4. Step 4: Simplify right side
    678,491.60x = 385,586,269,237.68
  5. Step 5: Solve for x
    x = 385,586,269,237.68/678,491.60
  6. Step 6: Final answer
    x = 568,299.25

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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.