Home / 685,939.13-1,028,961.93-206,129.48

Finding the Fourth Proportional to 685,939.13, 1,028,961.93 and 206,129.48

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Solution

The fourth proportional to 685,939.13, 1,028,961.93 and 206,129.48 is: 309,210.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,939.13 : 1,028,961.93 = 206,129.48 : x
  2. Step 2: Convert to fraction form
    685,939.13/1,028,961.93 = 206,129.48/x
  3. Step 3: Cross multiply
    685,939.13x = 1,028,961.93 × 206,129.48
  4. Step 4: Simplify right side
    685,939.13x = 212,099,387,570.70
  5. Step 5: Solve for x
    x = 212,099,387,570.70/685,939.13
  6. Step 6: Final answer
    x = 309,210.22

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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.