Home / 685,144.52-1,027,716.78-211,819.40

Finding the Fourth Proportional to 685,144.52, 1,027,716.78 and 211,819.40

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Solution

The fourth proportional to 685,144.52, 1,027,716.78 and 211,819.40 is: 317,729.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,144.52 : 1,027,716.78 = 211,819.40 : x
  2. Step 2: Convert to fraction form
    685,144.52/1,027,716.78 = 211,819.40/x
  3. Step 3: Cross multiply
    685,144.52x = 1,027,716.78 × 211,819.40
  4. Step 4: Simplify right side
    685,144.52x = 217,690,346,570.95
  5. Step 5: Solve for x
    x = 217,690,346,570.95/685,144.52
  6. Step 6: Final answer
    x = 317,729.09

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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.