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Finding the Fourth Proportional to 489,760.72, 675,879.82 and 274,916.32

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Solution

The fourth proportional to 489,760.72, 675,879.82 and 274,916.32 is: 379,390.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,760.72 : 675,879.82 = 274,916.32 : x
  2. Step 2: Convert to fraction form
    489,760.72/675,879.82 = 274,916.32/x
  3. Step 3: Cross multiply
    489,760.72x = 675,879.82 × 274,916.32
  4. Step 4: Simplify right side
    489,760.72x = 185,810,392,876.66
  5. Step 5: Solve for x
    x = 185,810,392,876.66/489,760.72
  6. Step 6: Final answer
    x = 379,390.15

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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.