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Finding the Fourth Proportional to 393,783.08, 590,768.73 and 127,543.91

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Solution

The fourth proportional to 393,783.08, 590,768.73 and 127,543.91 is: 191,346.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,783.08 : 590,768.73 = 127,543.91 : x
  2. Step 2: Convert to fraction form
    393,783.08/590,768.73 = 127,543.91/x
  3. Step 3: Cross multiply
    393,783.08x = 590,768.73 × 127,543.91
  4. Step 4: Simplify right side
    393,783.08x = 75,348,950,776.09
  5. Step 5: Solve for x
    x = 75,348,950,776.09/393,783.08
  6. Step 6: Final answer
    x = 191,346.34

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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.