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Finding the Fourth Proportional to 327,291.69, 490,971.70 and 90,634.37

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Solution

The fourth proportional to 327,291.69, 490,971.70 and 90,634.37 is: 135,961.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,291.69 : 490,971.70 = 90,634.37 : x
  2. Step 2: Convert to fraction form
    327,291.69/490,971.70 = 90,634.37/x
  3. Step 3: Cross multiply
    327,291.69x = 490,971.70 × 90,634.37
  4. Step 4: Simplify right side
    327,291.69x = 44,498,910,011.53
  5. Step 5: Solve for x
    x = 44,498,910,011.53/327,291.69
  6. Step 6: Final answer
    x = 135,961.01

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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.