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Finding the Fourth Proportional to 936,991.80, 1,405,813.32 and 681,064.20

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Solution

The fourth proportional to 936,991.80, 1,405,813.32 and 681,064.20 is: 1,021,832.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    936,991.80 : 1,405,813.32 = 681,064.20 : x
  2. Step 2: Convert to fraction form
    936,991.80/1,405,813.32 = 681,064.20/x
  3. Step 3: Cross multiply
    936,991.80x = 1,405,813.32 × 681,064.20
  4. Step 4: Simplify right side
    936,991.80x = 957,449,124,135.14
  5. Step 5: Solve for x
    x = 957,449,124,135.14/936,991.80
  6. Step 6: Final answer
    x = 1,021,832.98

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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.