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Finding the Fourth Proportional to 409.22, 614.22 and 255.44

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Solution

The fourth proportional to 409.22, 614.22 and 255.44 is: 383.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.22 : 614.22 = 255.44 : x
  2. Step 2: Convert to fraction form
    409.22/614.22 = 255.44/x
  3. Step 3: Cross multiply
    409.22x = 614.22 × 255.44
  4. Step 4: Simplify right side
    409.22x = 156,893.48
  5. Step 5: Solve for x
    x = 156,893.48/409.22
  6. Step 6: Final answer
    x = 383.40

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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.