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Finding the Fourth Proportional to 489,709.98, 675,865.71 and 274,861.80

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Solution

The fourth proportional to 489,709.98, 675,865.71 and 274,861.80 is: 379,346.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,709.98 : 675,865.71 = 274,861.80 : x
  2. Step 2: Convert to fraction form
    489,709.98/675,865.71 = 274,861.80/x
  3. Step 3: Cross multiply
    489,709.98x = 675,865.71 × 274,861.80
  4. Step 4: Simplify right side
    489,709.98x = 185,769,665,608.88
  5. Step 5: Solve for x
    x = 185,769,665,608.88/489,709.98
  6. Step 6: Final answer
    x = 379,346.29

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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.