Home / 685,138.50-1,027,805.76-211,860.36

Finding the Fourth Proportional to 685,138.50, 1,027,805.76 and 211,860.36

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Solution

The fourth proportional to 685,138.50, 1,027,805.76 and 211,860.36 is: 317,820.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,138.50 : 1,027,805.76 = 211,860.36 : x
  2. Step 2: Convert to fraction form
    685,138.50/1,027,805.76 = 211,860.36/x
  3. Step 3: Cross multiply
    685,138.50x = 1,027,805.76 × 211,860.36
  4. Step 4: Simplify right side
    685,138.50x = 217,751,298,323.67
  5. Step 5: Solve for x
    x = 217,751,298,323.67/685,138.50
  6. Step 6: Final answer
    x = 317,820.85

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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.