Home / 685,131.20-1,027,696.80-657,137.60

Finding the Fourth Proportional to 685,131.20, 1,027,696.80 and 657,137.60

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Solution

The fourth proportional to 685,131.20, 1,027,696.80 and 657,137.60 is: 985,706.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,131.20 : 1,027,696.80 = 657,137.60 : x
  2. Step 2: Convert to fraction form
    685,131.20/1,027,696.80 = 657,137.60/x
  3. Step 3: Cross multiply
    685,131.20x = 1,027,696.80 × 657,137.60
  4. Step 4: Simplify right side
    685,131.20x = 675,338,208,679.68
  5. Step 5: Solve for x
    x = 675,338,208,679.68/685,131.20
  6. Step 6: Final answer
    x = 985,706.40

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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.