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Finding the Fourth Proportional to 326,716.65, 490,099.59 and 90,057.27

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Solution

The fourth proportional to 326,716.65, 490,099.59 and 90,057.27 is: 135,092.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,716.65 : 490,099.59 = 90,057.27 : x
  2. Step 2: Convert to fraction form
    326,716.65/490,099.59 = 90,057.27/x
  3. Step 3: Cross multiply
    326,716.65x = 490,099.59 × 90,057.27
  4. Step 4: Simplify right side
    326,716.65x = 44,137,031,103.52
  5. Step 5: Solve for x
    x = 44,137,031,103.52/326,716.65
  6. Step 6: Final answer
    x = 135,092.69

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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.