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Finding the Fourth Proportional to 263,638.48, 395,457.60 and 105,866.90

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Solution

The fourth proportional to 263,638.48, 395,457.60 and 105,866.90 is: 158,800.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,638.48 : 395,457.60 = 105,866.90 : x
  2. Step 2: Convert to fraction form
    263,638.48/395,457.60 = 105,866.90/x
  3. Step 3: Cross multiply
    263,638.48x = 395,457.60 × 105,866.90
  4. Step 4: Simplify right side
    263,638.48x = 41,865,870,193.44
  5. Step 5: Solve for x
    x = 41,865,870,193.44/263,638.48
  6. Step 6: Final answer
    x = 158,800.30

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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.