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Finding the Fourth Proportional to 392,405.92, 541,503.84 and 222,649.36

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Solution

The fourth proportional to 392,405.92, 541,503.84 and 222,649.36 is: 307,246.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,405.92 : 541,503.84 = 222,649.36 : x
  2. Step 2: Convert to fraction form
    392,405.92/541,503.84 = 222,649.36/x
  3. Step 3: Cross multiply
    392,405.92x = 541,503.84 × 222,649.36
  4. Step 4: Simplify right side
    392,405.92x = 120,565,483,413.54
  5. Step 5: Solve for x
    x = 120,565,483,413.54/392,405.92
  6. Step 6: Final answer
    x = 307,246.85

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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.