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Finding the Fourth Proportional to 418.82, 628.22 and 130.26

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Solution

The fourth proportional to 418.82, 628.22 and 130.26 is: 195.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.82 : 628.22 = 130.26 : x
  2. Step 2: Convert to fraction form
    418.82/628.22 = 130.26/x
  3. Step 3: Cross multiply
    418.82x = 628.22 × 130.26
  4. Step 4: Simplify right side
    418.82x = 81,831.94
  5. Step 5: Solve for x
    x = 81,831.94/418.82
  6. Step 6: Final answer
    x = 195.39

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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.