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Finding the Fourth Proportional to 409.55, 613.24 and 216.77

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Solution

The fourth proportional to 409.55, 613.24 and 216.77 is: 324.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.55 : 613.24 = 216.77 : x
  2. Step 2: Convert to fraction form
    409.55/613.24 = 216.77/x
  3. Step 3: Cross multiply
    409.55x = 613.24 × 216.77
  4. Step 4: Simplify right side
    409.55x = 132,932.03
  5. Step 5: Solve for x
    x = 132,932.03/409.55
  6. Step 6: Final answer
    x = 324.58

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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.