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Finding the Fourth Proportional to 634.82, 951.77 and 428.88

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Solution

The fourth proportional to 634.82, 951.77 and 428.88 is: 643.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.82 : 951.77 = 428.88 : x
  2. Step 2: Convert to fraction form
    634.82/951.77 = 428.88/x
  3. Step 3: Cross multiply
    634.82x = 951.77 × 428.88
  4. Step 4: Simplify right side
    634.82x = 408,192.97
  5. Step 5: Solve for x
    x = 408,192.97/634.82
  6. Step 6: Final answer
    x = 643.01

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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.