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Finding the Fourth Proportional to 263,920.56, 395,867.88 and 86,511.12

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Solution

The fourth proportional to 263,920.56, 395,867.88 and 86,511.12 is: 129,762.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,920.56 : 395,867.88 = 86,511.12 : x
  2. Step 2: Convert to fraction form
    263,920.56/395,867.88 = 86,511.12/x
  3. Step 3: Cross multiply
    263,920.56x = 395,867.88 × 86,511.12
  4. Step 4: Simplify right side
    263,920.56x = 34,246,973,670.83
  5. Step 5: Solve for x
    x = 34,246,973,670.83/263,920.56
  6. Step 6: Final answer
    x = 129,762.43

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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.