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Finding the Fourth Proportional to 640,617.22, 961,125.72 and 191,355.81

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Solution

The fourth proportional to 640,617.22, 961,125.72 and 191,355.81 is: 287,093.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,617.22 : 961,125.72 = 191,355.81 : x
  2. Step 2: Convert to fraction form
    640,617.22/961,125.72 = 191,355.81/x
  3. Step 3: Cross multiply
    640,617.22x = 961,125.72 × 191,355.81
  4. Step 4: Simplify right side
    640,617.22x = 183,916,990,662.43
  5. Step 5: Solve for x
    x = 183,916,990,662.43/640,617.22
  6. Step 6: Final answer
    x = 287,093.43

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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.