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Finding the Fourth Proportional to 627.96, 936.83 and 611.86

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Solution

The fourth proportional to 627.96, 936.83 and 611.86 is: 912.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.96 : 936.83 = 611.86 : x
  2. Step 2: Convert to fraction form
    627.96/936.83 = 611.86/x
  3. Step 3: Cross multiply
    627.96x = 936.83 × 611.86
  4. Step 4: Simplify right side
    627.96x = 573,208.80
  5. Step 5: Solve for x
    x = 573,208.80/627.96
  6. Step 6: Final answer
    x = 912.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.