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Finding the Fourth Proportional to 540.23, 809.83 and 408.25

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Solution

The fourth proportional to 540.23, 809.83 and 408.25 is: 611.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.23 : 809.83 = 408.25 : x
  2. Step 2: Convert to fraction form
    540.23/809.83 = 408.25/x
  3. Step 3: Cross multiply
    540.23x = 809.83 × 408.25
  4. Step 4: Simplify right side
    540.23x = 330,613.10
  5. Step 5: Solve for x
    x = 330,613.10/540.23
  6. Step 6: Final answer
    x = 611.99

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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.