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Finding the Fourth Proportional to 818.01, 1,226.21 and 330.75

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Solution

The fourth proportional to 818.01, 1,226.21 and 330.75 is: 495.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.01 : 1,226.21 = 330.75 : x
  2. Step 2: Convert to fraction form
    818.01/1,226.21 = 330.75/x
  3. Step 3: Cross multiply
    818.01x = 1,226.21 × 330.75
  4. Step 4: Simplify right side
    818.01x = 405,567.30
  5. Step 5: Solve for x
    x = 405,567.30/818.01
  6. Step 6: Final answer
    x = 495.80

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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.