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Finding the Fourth Proportional to 324,286.39, 486,440.52 and 87,631.12

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Solution

The fourth proportional to 324,286.39, 486,440.52 and 87,631.12 is: 131,449.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,286.39 : 486,440.52 = 87,631.12 : x
  2. Step 2: Convert to fraction form
    324,286.39/486,440.52 = 87,631.12/x
  3. Step 3: Cross multiply
    324,286.39x = 486,440.52 × 87,631.12
  4. Step 4: Simplify right side
    324,286.39x = 42,627,327,580.98
  5. Step 5: Solve for x
    x = 42,627,327,580.98/324,286.39
  6. Step 6: Final answer
    x = 131,449.63

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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.