Home / 685,709.75-1,028,366.03-205,918.19

Finding the Fourth Proportional to 685,709.75, 1,028,366.03 and 205,918.19

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Solution

The fourth proportional to 685,709.75, 1,028,366.03 and 205,918.19 is: 308,817.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,709.75 : 1,028,366.03 = 205,918.19 : x
  2. Step 2: Convert to fraction form
    685,709.75/1,028,366.03 = 205,918.19/x
  3. Step 3: Cross multiply
    685,709.75x = 1,028,366.03 × 205,918.19
  4. Step 4: Simplify right side
    685,709.75x = 211,759,270,525.50
  5. Step 5: Solve for x
    x = 211,759,270,525.50/685,709.75
  6. Step 6: Final answer
    x = 308,817.65

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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.