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Finding the Fourth Proportional to 263,755.40, 395,633.10 and 86,219.60

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Solution

The fourth proportional to 263,755.40, 395,633.10 and 86,219.60 is: 129,329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,755.40 : 395,633.10 = 86,219.60 : x
  2. Step 2: Convert to fraction form
    263,755.40/395,633.10 = 86,219.60/x
  3. Step 3: Cross multiply
    263,755.40x = 395,633.10 × 86,219.60
  4. Step 4: Simplify right side
    263,755.40x = 34,111,327,628.76
  5. Step 5: Solve for x
    x = 34,111,327,628.76/263,755.40
  6. Step 6: Final answer
    x = 129,329.40

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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.