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Finding the Fourth Proportional to 257,786.50, 386,587.49 and 89,261.60

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Solution

The fourth proportional to 257,786.50, 386,587.49 and 89,261.60 is: 133,860.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,786.50 : 386,587.49 = 89,261.60 : x
  2. Step 2: Convert to fraction form
    257,786.50/386,587.49 = 89,261.60/x
  3. Step 3: Cross multiply
    257,786.50x = 386,587.49 × 89,261.60
  4. Step 4: Simplify right side
    257,786.50x = 34,507,415,518.14
  5. Step 5: Solve for x
    x = 34,507,415,518.14/257,786.50
  6. Step 6: Final answer
    x = 133,860.44

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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.