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Finding the Fourth Proportional to 489,042, 674,879.81 and 285,233.67

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Solution

The fourth proportional to 489,042, 674,879.81 and 285,233.67 is: 393,623.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,042 : 674,879.81 = 285,233.67 : x
  2. Step 2: Convert to fraction form
    489,042/674,879.81 = 285,233.67/x
  3. Step 3: Cross multiply
    489,042x = 674,879.81 × 285,233.67
  4. Step 4: Simplify right side
    489,042x = 192,498,443,589.03
  5. Step 5: Solve for x
    x = 192,498,443,589.03/489,042
  6. Step 6: Final answer
    x = 393,623.54

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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.