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Finding the Fourth Proportional to 634.26, 952.27 and 438.78

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Solution

The fourth proportional to 634.26, 952.27 and 438.78 is: 658.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.26 : 952.27 = 438.78 : x
  2. Step 2: Convert to fraction form
    634.26/952.27 = 438.78/x
  3. Step 3: Cross multiply
    634.26x = 952.27 × 438.78
  4. Step 4: Simplify right side
    634.26x = 417,834.84
  5. Step 5: Solve for x
    x = 417,834.84/634.26
  6. Step 6: Final answer
    x = 658.78

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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.