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Finding the Fourth Proportional to 305,376.54, 421,420.69 and 169,413.18

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Solution

The fourth proportional to 305,376.54, 421,420.69 and 169,413.18 is: 233,790.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,376.54 : 421,420.69 = 169,413.18 : x
  2. Step 2: Convert to fraction form
    305,376.54/421,420.69 = 169,413.18/x
  3. Step 3: Cross multiply
    305,376.54x = 421,420.69 × 169,413.18
  4. Step 4: Simplify right side
    305,376.54x = 71,394,219,210.69
  5. Step 5: Solve for x
    x = 71,394,219,210.69/305,376.54
  6. Step 6: Final answer
    x = 233,790.78

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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.