Home / 685,710.75-1,028,367.52-205,919.19

Finding the Fourth Proportional to 685,710.75, 1,028,367.52 and 205,919.19

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Solution

The fourth proportional to 685,710.75, 1,028,367.52 and 205,919.19 is: 308,819.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,710.75 : 1,028,367.52 = 205,919.19 : x
  2. Step 2: Convert to fraction form
    685,710.75/1,028,367.52 = 205,919.19/x
  3. Step 3: Cross multiply
    685,710.75x = 1,028,367.52 × 205,919.19
  4. Step 4: Simplify right side
    685,710.75x = 211,760,606,740.71
  5. Step 5: Solve for x
    x = 211,760,606,740.71/685,710.75
  6. Step 6: Final answer
    x = 308,819.14

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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.