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Finding the Fourth Proportional to 661,086.81, 991,630.44 and 181,319.61

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Solution

The fourth proportional to 661,086.81, 991,630.44 and 181,319.61 is: 271,979.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,086.81 : 991,630.44 = 181,319.61 : x
  2. Step 2: Convert to fraction form
    661,086.81/991,630.44 = 181,319.61/x
  3. Step 3: Cross multiply
    661,086.81x = 991,630.44 × 181,319.61
  4. Step 4: Simplify right side
    661,086.81x = 179,802,044,644.93
  5. Step 5: Solve for x
    x = 179,802,044,644.93/661,086.81
  6. Step 6: Final answer
    x = 271,979.48

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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.