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Finding the Fourth Proportional to 319,489.11, 440,887.86 and 176,249.11

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Solution

The fourth proportional to 319,489.11, 440,887.86 and 176,249.11 is: 243,219.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,489.11 : 440,887.86 = 176,249.11 : x
  2. Step 2: Convert to fraction form
    319,489.11/440,887.86 = 176,249.11/x
  3. Step 3: Cross multiply
    319,489.11x = 440,887.86 × 176,249.11
  4. Step 4: Simplify right side
    319,489.11x = 77,706,094,146.85
  5. Step 5: Solve for x
    x = 77,706,094,146.85/319,489.11
  6. Step 6: Final answer
    x = 243,219.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.