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Finding the Fourth Proportional to 634.69, 950.56 and 612.80

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Solution

The fourth proportional to 634.69, 950.56 and 612.80 is: 917.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.69 : 950.56 = 612.80 : x
  2. Step 2: Convert to fraction form
    634.69/950.56 = 612.80/x
  3. Step 3: Cross multiply
    634.69x = 950.56 × 612.80
  4. Step 4: Simplify right side
    634.69x = 582,503.17
  5. Step 5: Solve for x
    x = 582,503.17/634.69
  6. Step 6: Final answer
    x = 917.78

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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.