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Finding the Fourth Proportional to 489,857.87, 675,966.53 and 274,956.41

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Solution

The fourth proportional to 489,857.87, 675,966.53 and 274,956.41 is: 379,418.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,857.87 : 675,966.53 = 274,956.41 : x
  2. Step 2: Convert to fraction form
    489,857.87/675,966.53 = 274,956.41/x
  3. Step 3: Cross multiply
    489,857.87x = 675,966.53 × 274,956.41
  4. Step 4: Simplify right side
    489,857.87x = 185,861,325,614.34
  5. Step 5: Solve for x
    x = 185,861,325,614.34/489,857.87
  6. Step 6: Final answer
    x = 379,418.89

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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.