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Finding the Fourth Proportional to 662.72, 994.25 and 419.06

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Solution

The fourth proportional to 662.72, 994.25 and 419.06 is: 628.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.72 : 994.25 = 419.06 : x
  2. Step 2: Convert to fraction form
    662.72/994.25 = 419.06/x
  3. Step 3: Cross multiply
    662.72x = 994.25 × 419.06
  4. Step 4: Simplify right side
    662.72x = 416,653.94
  5. Step 5: Solve for x
    x = 416,653.94/662.72
  6. Step 6: Final answer
    x = 628.71

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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.