Home / 685,901.45-1,028,634.11-641,123.29

Finding the Fourth Proportional to 685,901.45, 1,028,634.11 and 641,123.29

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Solution

The fourth proportional to 685,901.45, 1,028,634.11 and 641,123.29 is: 961,481.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,901.45 : 1,028,634.11 = 641,123.29 : x
  2. Step 2: Convert to fraction form
    685,901.45/1,028,634.11 = 641,123.29/x
  3. Step 3: Cross multiply
    685,901.45x = 1,028,634.11 × 641,123.29
  4. Step 4: Simplify right side
    685,901.45x = 659,481,283,840.65
  5. Step 5: Solve for x
    x = 659,481,283,840.65/685,901.45
  6. Step 6: Final answer
    x = 961,481.10

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1.5x scale

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.