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Finding the Fourth Proportional to 325,803.28, 488,639.30 and 89,169.88

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Solution

The fourth proportional to 325,803.28, 488,639.30 and 89,169.88 is: 133,736.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,803.28 : 488,639.30 = 89,169.88 : x
  2. Step 2: Convert to fraction form
    325,803.28/488,639.30 = 89,169.88/x
  3. Step 3: Cross multiply
    325,803.28x = 488,639.30 × 89,169.88
  4. Step 4: Simplify right side
    325,803.28x = 43,571,907,744.28
  5. Step 5: Solve for x
    x = 43,571,907,744.28/325,803.28
  6. Step 6: Final answer
    x = 133,736.86

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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.