Home / 678,786.60-1,017,920.70-205,314.60

Finding the Fourth Proportional to 678,786.60, 1,017,920.70 and 205,314.60

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Solution

The fourth proportional to 678,786.60, 1,017,920.70 and 205,314.60 is: 307,893.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,786.60 : 1,017,920.70 = 205,314.60 : x
  2. Step 2: Convert to fraction form
    678,786.60/1,017,920.70 = 205,314.60/x
  3. Step 3: Cross multiply
    678,786.60x = 1,017,920.70 × 205,314.60
  4. Step 4: Simplify right side
    678,786.60x = 208,993,981,352.22
  5. Step 5: Solve for x
    x = 208,993,981,352.22/678,786.60
  6. Step 6: Final answer
    x = 307,893.50

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Double scale
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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.