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Finding the Fourth Proportional to 489,661.05, 675,745.65 and 274,814.43

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Solution

The fourth proportional to 489,661.05, 675,745.65 and 274,814.43 is: 379,251.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,661.05 : 675,745.65 = 274,814.43 : x
  2. Step 2: Convert to fraction form
    489,661.05/675,745.65 = 274,814.43/x
  3. Step 3: Cross multiply
    489,661.05x = 675,745.65 × 274,814.43
  4. Step 4: Simplify right side
    489,661.05x = 185,704,655,629.73
  5. Step 5: Solve for x
    x = 185,704,655,629.73/489,661.05
  6. Step 6: Final answer
    x = 379,251.43

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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.