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Finding the Fourth Proportional to 325,890.90, 488,836.35 and 89,233.20

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Solution

The fourth proportional to 325,890.90, 488,836.35 and 89,233.20 is: 133,849.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,890.90 : 488,836.35 = 89,233.20 : x
  2. Step 2: Convert to fraction form
    325,890.90/488,836.35 = 89,233.20/x
  3. Step 3: Cross multiply
    325,890.90x = 488,836.35 × 89,233.20
  4. Step 4: Simplify right side
    325,890.90x = 43,620,431,786.82
  5. Step 5: Solve for x
    x = 43,620,431,786.82/325,890.90
  6. Step 6: Final answer
    x = 133,849.80

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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.