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Finding the Fourth Proportional to 662.88, 994.32 and 206.88

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Solution

The fourth proportional to 662.88, 994.32 and 206.88 is: 310.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.88 : 994.32 = 206.88 : x
  2. Step 2: Convert to fraction form
    662.88/994.32 = 206.88/x
  3. Step 3: Cross multiply
    662.88x = 994.32 × 206.88
  4. Step 4: Simplify right side
    662.88x = 205,704.92
  5. Step 5: Solve for x
    x = 205,704.92/662.88
  6. Step 6: Final answer
    x = 310.32

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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.