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Finding the Fourth Proportional to 279,982.73, 420,170.93 and 253,213.85

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Solution

The fourth proportional to 279,982.73, 420,170.93 and 253,213.85 is: 379,998.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,982.73 : 420,170.93 = 253,213.85 : x
  2. Step 2: Convert to fraction form
    279,982.73/420,170.93 = 253,213.85/x
  3. Step 3: Cross multiply
    279,982.73x = 420,170.93 × 253,213.85
  4. Step 4: Simplify right side
    279,982.73x = 106,393,095,476.46
  5. Step 5: Solve for x
    x = 106,393,095,476.46/279,982.73
  6. Step 6: Final answer
    x = 379,998.79

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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.