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Finding the Fourth Proportional to 207.82, 311.70 and 63.55

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Solution

The fourth proportional to 207.82, 311.70 and 63.55 is: 95.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.82 : 311.70 = 63.55 : x
  2. Step 2: Convert to fraction form
    207.82/311.70 = 63.55/x
  3. Step 3: Cross multiply
    207.82x = 311.70 × 63.55
  4. Step 4: Simplify right side
    207.82x = 19,808.54
  5. Step 5: Solve for x
    x = 19,808.54/207.82
  6. Step 6: Final answer
    x = 95.32

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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.