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Finding the Fourth Proportional to 263,611.59, 395,479.95 and 86,118.31

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Solution

The fourth proportional to 263,611.59, 395,479.95 and 86,118.31 is: 129,197.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,611.59 : 395,479.95 = 86,118.31 : x
  2. Step 2: Convert to fraction form
    263,611.59/395,479.95 = 86,118.31/x
  3. Step 3: Cross multiply
    263,611.59x = 395,479.95 × 86,118.31
  4. Step 4: Simplify right side
    263,611.59x = 34,058,064,932.88
  5. Step 5: Solve for x
    x = 34,058,064,932.88/263,611.59
  6. Step 6: Final answer
    x = 129,197.90

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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.