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Finding the Fourth Proportional to 207.03, 309.94 and 109.30

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Solution

The fourth proportional to 207.03, 309.94 and 109.30 is: 163.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.03 : 309.94 = 109.30 : x
  2. Step 2: Convert to fraction form
    207.03/309.94 = 109.30/x
  3. Step 3: Cross multiply
    207.03x = 309.94 × 109.30
  4. Step 4: Simplify right side
    207.03x = 33,876.44
  5. Step 5: Solve for x
    x = 33,876.44/207.03
  6. Step 6: Final answer
    x = 163.63

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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.