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Finding the Fourth Proportional to 207.58, 311.43 and 193.81

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Solution

The fourth proportional to 207.58, 311.43 and 193.81 is: 290.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.58 : 311.43 = 193.81 : x
  2. Step 2: Convert to fraction form
    207.58/311.43 = 193.81/x
  3. Step 3: Cross multiply
    207.58x = 311.43 × 193.81
  4. Step 4: Simplify right side
    207.58x = 60,358.25
  5. Step 5: Solve for x
    x = 60,358.25/207.58
  6. Step 6: Final answer
    x = 290.77

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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.