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Finding the Fourth Proportional to 770,825.80, 1,154,769.90 and 415,721.80

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Solution

The fourth proportional to 770,825.80, 1,154,769.90 and 415,721.80 is: 622,790.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,825.80 : 1,154,769.90 = 415,721.80 : x
  2. Step 2: Convert to fraction form
    770,825.80/1,154,769.90 = 415,721.80/x
  3. Step 3: Cross multiply
    770,825.80x = 1,154,769.90 × 415,721.80
  4. Step 4: Simplify right side
    770,825.80x = 480,063,021,413.82
  5. Step 5: Solve for x
    x = 480,063,021,413.82/770,825.80
  6. Step 6: Final answer
    x = 622,790.55

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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.