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Finding the Fourth Proportional to 200.69, 300.90 and 109.30

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Solution

The fourth proportional to 200.69, 300.90 and 109.30 is: 163.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.69 : 300.90 = 109.30 : x
  2. Step 2: Convert to fraction form
    200.69/300.90 = 109.30/x
  3. Step 3: Cross multiply
    200.69x = 300.90 × 109.30
  4. Step 4: Simplify right side
    200.69x = 32,888.37
  5. Step 5: Solve for x
    x = 32,888.37/200.69
  6. Step 6: Final answer
    x = 163.88

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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.