Home / 685,938.13-1,028,960.43-206,128.48

Finding the Fourth Proportional to 685,938.13, 1,028,960.43 and 206,128.48

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Solution

The fourth proportional to 685,938.13, 1,028,960.43 and 206,128.48 is: 309,208.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,938.13 : 1,028,960.43 = 206,128.48 : x
  2. Step 2: Convert to fraction form
    685,938.13/1,028,960.43 = 206,128.48/x
  3. Step 3: Cross multiply
    685,938.13x = 1,028,960.43 × 206,128.48
  4. Step 4: Simplify right side
    685,938.13x = 212,098,046,843.65
  5. Step 5: Solve for x
    x = 212,098,046,843.65/685,938.13
  6. Step 6: Final answer
    x = 309,208.71

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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.