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Finding the Fourth Proportional to 354,568.05, 489,413.07 and 218,644.65

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Solution

The fourth proportional to 354,568.05, 489,413.07 and 218,644.65 is: 301,796.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,568.05 : 489,413.07 = 218,644.65 : x
  2. Step 2: Convert to fraction form
    354,568.05/489,413.07 = 218,644.65/x
  3. Step 3: Cross multiply
    354,568.05x = 489,413.07 × 218,644.65
  4. Step 4: Simplify right side
    354,568.05x = 107,007,549,395.58
  5. Step 5: Solve for x
    x = 107,007,549,395.58/354,568.05
  6. Step 6: Final answer
    x = 301,796.93

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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.