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Finding the Fourth Proportional to 328,209.69, 492,270.75 and 91,532.55

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Solution

The fourth proportional to 328,209.69, 492,270.75 and 91,532.55 is: 137,286.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,209.69 : 492,270.75 = 91,532.55 : x
  2. Step 2: Convert to fraction form
    328,209.69/492,270.75 = 91,532.55/x
  3. Step 3: Cross multiply
    328,209.69x = 492,270.75 × 91,532.55
  4. Step 4: Simplify right side
    328,209.69x = 45,058,797,037.91
  5. Step 5: Solve for x
    x = 45,058,797,037.91/328,209.69
  6. Step 6: Final answer
    x = 137,286.61

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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.