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Finding the Fourth Proportional to 325,735.20, 489,040.20 and 207,928.80

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Solution

The fourth proportional to 325,735.20, 489,040.20 and 207,928.80 is: 312,172.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,735.20 : 489,040.20 = 207,928.80 : x
  2. Step 2: Convert to fraction form
    325,735.20/489,040.20 = 207,928.80/x
  3. Step 3: Cross multiply
    325,735.20x = 489,040.20 × 207,928.80
  4. Step 4: Simplify right side
    325,735.20x = 101,685,541,937.76
  5. Step 5: Solve for x
    x = 101,685,541,937.76/325,735.20
  6. Step 6: Final answer
    x = 312,172.41

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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.