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Finding the Fourth Proportional to 395,439.49, 592,759.78 and 155,721.61

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Solution

The fourth proportional to 395,439.49, 592,759.78 and 155,721.61 is: 233,425.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,439.49 : 592,759.78 = 155,721.61 : x
  2. Step 2: Convert to fraction form
    395,439.49/592,759.78 = 155,721.61/x
  3. Step 3: Cross multiply
    395,439.49x = 592,759.78 × 155,721.61
  4. Step 4: Simplify right side
    395,439.49x = 92,305,505,413.64
  5. Step 5: Solve for x
    x = 92,305,505,413.64/395,439.49
  6. Step 6: Final answer
    x = 233,425.11

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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.