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Finding the Fourth Proportional to 326,788.92, 490,217.46 and 90,131.64

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Solution

The fourth proportional to 326,788.92, 490,217.46 and 90,131.64 is: 135,206.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,788.92 : 490,217.46 = 90,131.64 : x
  2. Step 2: Convert to fraction form
    326,788.92/490,217.46 = 90,131.64/x
  3. Step 3: Cross multiply
    326,788.92x = 490,217.46 × 90,131.64
  4. Step 4: Simplify right side
    326,788.92x = 44,184,103,626.43
  5. Step 5: Solve for x
    x = 44,184,103,626.43/326,788.92
  6. Step 6: Final answer
    x = 135,206.86

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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.