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Finding the Fourth Proportional to 326,648.30, 489,974.87 and 90,003.96

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Solution

The fourth proportional to 326,648.30, 489,974.87 and 90,003.96 is: 135,006.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,648.30 : 489,974.87 = 90,003.96 : x
  2. Step 2: Convert to fraction form
    326,648.30/489,974.87 = 90,003.96/x
  3. Step 3: Cross multiply
    326,648.30x = 489,974.87 × 90,003.96
  4. Step 4: Simplify right side
    326,648.30x = 44,099,678,825.50
  5. Step 5: Solve for x
    x = 44,099,678,825.50/326,648.30
  6. Step 6: Final answer
    x = 135,006.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.