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Finding the Fourth Proportional to 394,301.19, 542,413.87 and 345,684.18

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Solution

The fourth proportional to 394,301.19, 542,413.87 and 345,684.18 is: 475,534.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,301.19 : 542,413.87 = 345,684.18 : x
  2. Step 2: Convert to fraction form
    394,301.19/542,413.87 = 345,684.18/x
  3. Step 3: Cross multiply
    394,301.19x = 542,413.87 × 345,684.18
  4. Step 4: Simplify right side
    394,301.19x = 187,503,893,871.58
  5. Step 5: Solve for x
    x = 187,503,893,871.58/394,301.19
  6. Step 6: Final answer
    x = 475,534.69

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1.5x scale

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.