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Finding the Fourth Proportional to 397,806.89, 548,975.79 and 216,518.38

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Solution

The fourth proportional to 397,806.89, 548,975.79 and 216,518.38 is: 298,796.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,806.89 : 548,975.79 = 216,518.38 : x
  2. Step 2: Convert to fraction form
    397,806.89/548,975.79 = 216,518.38/x
  3. Step 3: Cross multiply
    397,806.89x = 548,975.79 × 216,518.38
  4. Step 4: Simplify right side
    397,806.89x = 118,863,348,780.89
  5. Step 5: Solve for x
    x = 118,863,348,780.89/397,806.89
  6. Step 6: Final answer
    x = 298,796.61

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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.