Home / 685,422.09-1,028,348.22-412,182.78

Finding the Fourth Proportional to 685,422.09, 1,028,348.22 and 412,182.78

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Solution

The fourth proportional to 685,422.09, 1,028,348.22 and 412,182.78 is: 618,403.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,422.09 : 1,028,348.22 = 412,182.78 : x
  2. Step 2: Convert to fraction form
    685,422.09/1,028,348.22 = 412,182.78/x
  3. Step 3: Cross multiply
    685,422.09x = 1,028,348.22 × 412,182.78
  4. Step 4: Simplify right side
    685,422.09x = 423,867,428,127.65
  5. Step 5: Solve for x
    x = 423,867,428,127.65/685,422.09
  6. Step 6: Final answer
    x = 618,403.51

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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.