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Finding the Fourth Proportional to 418.09, 627.25 and 125.59

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Solution

The fourth proportional to 418.09, 627.25 and 125.59 is: 188.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.09 : 627.25 = 125.59 : x
  2. Step 2: Convert to fraction form
    418.09/627.25 = 125.59/x
  3. Step 3: Cross multiply
    418.09x = 627.25 × 125.59
  4. Step 4: Simplify right side
    418.09x = 78,776.33
  5. Step 5: Solve for x
    x = 78,776.33/418.09
  6. Step 6: Final answer
    x = 188.42

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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.