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Finding the Fourth Proportional to 634.64, 951.96 and 418.64

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Solution

The fourth proportional to 634.64, 951.96 and 418.64 is: 627.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.64 : 951.96 = 418.64 : x
  2. Step 2: Convert to fraction form
    634.64/951.96 = 418.64/x
  3. Step 3: Cross multiply
    634.64x = 951.96 × 418.64
  4. Step 4: Simplify right side
    634.64x = 398,528.53
  5. Step 5: Solve for x
    x = 398,528.53/634.64
  6. Step 6: Final answer
    x = 627.96

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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.