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Finding the Fourth Proportional to 489,857.05, 675,996.79 and 274,991.59

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Solution

The fourth proportional to 489,857.05, 675,996.79 and 274,991.59 is: 379,485.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,857.05 : 675,996.79 = 274,991.59 : x
  2. Step 2: Convert to fraction form
    489,857.05/675,996.79 = 274,991.59/x
  3. Step 3: Cross multiply
    489,857.05x = 675,996.79 × 274,991.59
  4. Step 4: Simplify right side
    489,857.05x = 185,893,428,049.53
  5. Step 5: Solve for x
    x = 185,893,428,049.53/489,857.05
  6. Step 6: Final answer
    x = 379,485.06

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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.