Home / 685,918.53-1,028,659.70-641,140.38

Finding the Fourth Proportional to 685,918.53, 1,028,659.70 and 641,140.38

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Solution

The fourth proportional to 685,918.53, 1,028,659.70 and 641,140.38 is: 961,506.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,918.53 : 1,028,659.70 = 641,140.38 : x
  2. Step 2: Convert to fraction form
    685,918.53/1,028,659.70 = 641,140.38/x
  3. Step 3: Cross multiply
    685,918.53x = 1,028,659.70 × 641,140.38
  4. Step 4: Simplify right side
    685,918.53x = 659,515,272,551.54
  5. Step 5: Solve for x
    x = 659,515,272,551.54/685,918.53
  6. Step 6: Final answer
    x = 961,506.72

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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.