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Finding the Fourth Proportional to 489,661.72, 675,745.26 and 274,818.12

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Solution

The fourth proportional to 489,661.72, 675,745.26 and 274,818.12 is: 379,255.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,661.72 : 675,745.26 = 274,818.12 : x
  2. Step 2: Convert to fraction form
    489,661.72/675,745.26 = 274,818.12/x
  3. Step 3: Cross multiply
    489,661.72x = 675,745.26 × 274,818.12
  4. Step 4: Simplify right side
    489,661.72x = 185,707,041,952.11
  5. Step 5: Solve for x
    x = 185,707,041,952.11/489,661.72
  6. Step 6: Final answer
    x = 379,255.79

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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.