Home / 685,713.25-1,028,371.27-205,921.69

Finding the Fourth Proportional to 685,713.25, 1,028,371.27 and 205,921.69

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Solution

The fourth proportional to 685,713.25, 1,028,371.27 and 205,921.69 is: 308,822.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,713.25 : 1,028,371.27 = 205,921.69 : x
  2. Step 2: Convert to fraction form
    685,713.25/1,028,371.27 = 205,921.69/x
  3. Step 3: Cross multiply
    685,713.25x = 1,028,371.27 × 205,921.69
  4. Step 4: Simplify right side
    685,713.25x = 211,763,949,865.85
  5. Step 5: Solve for x
    x = 211,763,949,865.85/685,713.25
  6. Step 6: Final answer
    x = 308,822.89

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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.