Home / 685,129.70-1,027,694.55-657,136.10

Finding the Fourth Proportional to 685,129.70, 1,027,694.55 and 657,136.10

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Solution

The fourth proportional to 685,129.70, 1,027,694.55 and 657,136.10 is: 985,704.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,129.70 : 1,027,694.55 = 657,136.10 : x
  2. Step 2: Convert to fraction form
    685,129.70/1,027,694.55 = 657,136.10/x
  3. Step 3: Cross multiply
    685,129.70x = 1,027,694.55 × 657,136.10
  4. Step 4: Simplify right side
    685,129.70x = 675,335,188,578.26
  5. Step 5: Solve for x
    x = 675,335,188,578.26/685,129.70
  6. Step 6: Final answer
    x = 985,704.15

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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.