Home / 685,939.44-1,028,962.40-206,129.79

Finding the Fourth Proportional to 685,939.44, 1,028,962.40 and 206,129.79

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Solution

The fourth proportional to 685,939.44, 1,028,962.40 and 206,129.79 is: 309,210.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,939.44 : 1,028,962.40 = 206,129.79 : x
  2. Step 2: Convert to fraction form
    685,939.44/1,028,962.40 = 206,129.79/x
  3. Step 3: Cross multiply
    685,939.44x = 1,028,962.40 × 206,129.79
  4. Step 4: Simplify right side
    685,939.44x = 212,099,803,429.90
  5. Step 5: Solve for x
    x = 212,099,803,429.90/685,939.44
  6. Step 6: Final answer
    x = 309,210.68

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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.