Home / 678,279.40-1,017,879.90-378,759.40

Finding the Fourth Proportional to 678,279.40, 1,017,879.90 and 378,759.40

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Solution

The fourth proportional to 678,279.40, 1,017,879.90 and 378,759.40 is: 568,396.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,279.40 : 1,017,879.90 = 378,759.40 : x
  2. Step 2: Convert to fraction form
    678,279.40/1,017,879.90 = 378,759.40/x
  3. Step 3: Cross multiply
    678,279.40x = 1,017,879.90 × 378,759.40
  4. Step 4: Simplify right side
    678,279.40x = 385,531,580,196.06
  5. Step 5: Solve for x
    x = 385,531,580,196.06/678,279.40
  6. Step 6: Final answer
    x = 568,396.42

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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.