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Finding the Fourth Proportional to 662.38, 914.05 and 396.94

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Solution

The fourth proportional to 662.38, 914.05 and 396.94 is: 547.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.38 : 914.05 = 396.94 : x
  2. Step 2: Convert to fraction form
    662.38/914.05 = 396.94/x
  3. Step 3: Cross multiply
    662.38x = 914.05 × 396.94
  4. Step 4: Simplify right side
    662.38x = 362,823.01
  5. Step 5: Solve for x
    x = 362,823.01/662.38
  6. Step 6: Final answer
    x = 547.76

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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.