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Finding the Fourth Proportional to 635.05, 951.76 and 418.78

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Solution

The fourth proportional to 635.05, 951.76 and 418.78 is: 627.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.05 : 951.76 = 418.78 : x
  2. Step 2: Convert to fraction form
    635.05/951.76 = 418.78/x
  3. Step 3: Cross multiply
    635.05x = 951.76 × 418.78
  4. Step 4: Simplify right side
    635.05x = 398,578.05
  5. Step 5: Solve for x
    x = 398,578.05/635.05
  6. Step 6: Final answer
    x = 627.63

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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.