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Finding the Fourth Proportional to 635.90, 953.94 and 311.28

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Solution

The fourth proportional to 635.90, 953.94 and 311.28 is: 466.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.90 : 953.94 = 311.28 : x
  2. Step 2: Convert to fraction form
    635.90/953.94 = 311.28/x
  3. Step 3: Cross multiply
    635.90x = 953.94 × 311.28
  4. Step 4: Simplify right side
    635.90x = 296,942.44
  5. Step 5: Solve for x
    x = 296,942.44/635.90
  6. Step 6: Final answer
    x = 466.96

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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.