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Finding the Fourth Proportional to 408,879.36, 613,406.42 and 124,592.61

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Solution

The fourth proportional to 408,879.36, 613,406.42 and 124,592.61 is: 186,915.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,879.36 : 613,406.42 = 124,592.61 : x
  2. Step 2: Convert to fraction form
    408,879.36/613,406.42 = 124,592.61/x
  3. Step 3: Cross multiply
    408,879.36x = 613,406.42 × 124,592.61
  4. Step 4: Simplify right side
    408,879.36x = 76,425,909,003.09
  5. Step 5: Solve for x
    x = 76,425,909,003.09/408,879.36
  6. Step 6: Final answer
    x = 186,915.55

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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.