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Finding the Fourth Proportional to 408,353.64, 612,481.86 and 108,856.68

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Solution

The fourth proportional to 408,353.64, 612,481.86 and 108,856.68 is: 163,272.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,353.64 : 612,481.86 = 108,856.68 : x
  2. Step 2: Convert to fraction form
    408,353.64/612,481.86 = 108,856.68/x
  3. Step 3: Cross multiply
    408,353.64x = 612,481.86 × 108,856.68
  4. Step 4: Simplify right side
    408,353.64x = 66,672,741,839.82
  5. Step 5: Solve for x
    x = 66,672,741,839.82/408,353.64
  6. Step 6: Final answer
    x = 163,272.06

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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.