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Finding the Fourth Proportional to 207.83, 311.81 and 63.55

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Solution

The fourth proportional to 207.83, 311.81 and 63.55 is: 95.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.83 : 311.81 = 63.55 : x
  2. Step 2: Convert to fraction form
    207.83/311.81 = 63.55/x
  3. Step 3: Cross multiply
    207.83x = 311.81 × 63.55
  4. Step 4: Simplify right side
    207.83x = 19,815.53
  5. Step 5: Solve for x
    x = 19,815.53/207.83
  6. Step 6: Final answer
    x = 95.34

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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.