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Finding the Fourth Proportional to 489,704.95, 675,858.78 and 274,856.77

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Solution

The fourth proportional to 489,704.95, 675,858.78 and 274,856.77 is: 379,339.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,704.95 : 675,858.78 = 274,856.77 : x
  2. Step 2: Convert to fraction form
    489,704.95/675,858.78 = 274,856.77/x
  3. Step 3: Cross multiply
    489,704.95x = 675,858.78 × 274,856.77
  4. Step 4: Simplify right side
    489,704.95x = 185,764,361,246.94
  5. Step 5: Solve for x
    x = 185,764,361,246.94/489,704.95
  6. Step 6: Final answer
    x = 379,339.36

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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.