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Finding the Fourth Proportional to 667,619.78, 996,573.25 and 618,281.06

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Solution

The fourth proportional to 667,619.78, 996,573.25 and 618,281.06 is: 922,924.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,619.78 : 996,573.25 = 618,281.06 : x
  2. Step 2: Convert to fraction form
    667,619.78/996,573.25 = 618,281.06/x
  3. Step 3: Cross multiply
    667,619.78x = 996,573.25 × 618,281.06
  4. Step 4: Simplify right side
    667,619.78x = 616,162,365,377.65
  5. Step 5: Solve for x
    x = 616,162,365,377.65/667,619.78
  6. Step 6: Final answer
    x = 922,924.07

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.