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Finding the Fourth Proportional to 866,640.21, 1,300,413.68 and 354,685.38

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Solution

The fourth proportional to 866,640.21, 1,300,413.68 and 354,685.38 is: 532,213.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,640.21 : 1,300,413.68 = 354,685.38 : x
  2. Step 2: Convert to fraction form
    866,640.21/1,300,413.68 = 354,685.38/x
  3. Step 3: Cross multiply
    866,640.21x = 1,300,413.68 × 354,685.38
  4. Step 4: Simplify right side
    866,640.21x = 461,237,718,474.57
  5. Step 5: Solve for x
    x = 461,237,718,474.57/866,640.21
  6. Step 6: Final answer
    x = 532,213.61

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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.