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Finding the Fourth Proportional to 325,912.80, 488,869.20 and 219,624.60

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Solution

The fourth proportional to 325,912.80, 488,869.20 and 219,624.60 is: 329,436.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,912.80 : 488,869.20 = 219,624.60 : x
  2. Step 2: Convert to fraction form
    325,912.80/488,869.20 = 219,624.60/x
  3. Step 3: Cross multiply
    325,912.80x = 488,869.20 × 219,624.60
  4. Step 4: Simplify right side
    325,912.80x = 107,367,702,502.32
  5. Step 5: Solve for x
    x = 107,367,702,502.32/325,912.80
  6. Step 6: Final answer
    x = 329,436.90

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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.