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Finding the Fourth Proportional to 263,189.34, 394,742.77 and 85,695.15

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Solution

The fourth proportional to 263,189.34, 394,742.77 and 85,695.15 is: 128,529.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,189.34 : 394,742.77 = 85,695.15 : x
  2. Step 2: Convert to fraction form
    263,189.34/394,742.77 = 85,695.15/x
  3. Step 3: Cross multiply
    263,189.34x = 394,742.77 × 85,695.15
  4. Step 4: Simplify right side
    263,189.34x = 33,827,540,886.57
  5. Step 5: Solve for x
    x = 33,827,540,886.57/263,189.34
  6. Step 6: Final answer
    x = 128,529.30

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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.