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Finding the Fourth Proportional to 200.70, 300.78 and 119.61

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Solution

The fourth proportional to 200.70, 300.78 and 119.61 is: 179.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.70 : 300.78 = 119.61 : x
  2. Step 2: Convert to fraction form
    200.70/300.78 = 119.61/x
  3. Step 3: Cross multiply
    200.70x = 300.78 × 119.61
  4. Step 4: Simplify right side
    200.70x = 35,976.30
  5. Step 5: Solve for x
    x = 35,976.30/200.70
  6. Step 6: Final answer
    x = 179.25

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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.