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Finding the Fourth Proportional to 662.25, 913.92 and 396.92

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Solution

The fourth proportional to 662.25, 913.92 and 396.92 is: 547.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.25 : 913.92 = 396.92 : x
  2. Step 2: Convert to fraction form
    662.25/913.92 = 396.92/x
  3. Step 3: Cross multiply
    662.25x = 913.92 × 396.92
  4. Step 4: Simplify right side
    662.25x = 362,748.56
  5. Step 5: Solve for x
    x = 362,748.56/662.25
  6. Step 6: Final answer
    x = 547.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.