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Finding the Fourth Proportional to 418.62, 627.49 and 144.61

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Solution

The fourth proportional to 418.62, 627.49 and 144.61 is: 216.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.62 : 627.49 = 144.61 : x
  2. Step 2: Convert to fraction form
    418.62/627.49 = 144.61/x
  3. Step 3: Cross multiply
    418.62x = 627.49 × 144.61
  4. Step 4: Simplify right side
    418.62x = 90,741.33
  5. Step 5: Solve for x
    x = 90,741.33/418.62
  6. Step 6: Final answer
    x = 216.76

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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.