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Finding the Fourth Proportional to 399,040.35, 550,687.37 and 217,763.96

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Solution

The fourth proportional to 399,040.35, 550,687.37 and 217,763.96 is: 300,520.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,040.35 : 550,687.37 = 217,763.96 : x
  2. Step 2: Convert to fraction form
    399,040.35/550,687.37 = 217,763.96/x
  3. Step 3: Cross multiply
    399,040.35x = 550,687.37 × 217,763.96
  4. Step 4: Simplify right side
    399,040.35x = 119,919,862,413.19
  5. Step 5: Solve for x
    x = 119,919,862,413.19/399,040.35
  6. Step 6: Final answer
    x = 300,520.64

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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.