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Finding the Fourth Proportional to 200.45, 300.66 and 149.18

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Solution

The fourth proportional to 200.45, 300.66 and 149.18 is: 223.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.45 : 300.66 = 149.18 : x
  2. Step 2: Convert to fraction form
    200.45/300.66 = 149.18/x
  3. Step 3: Cross multiply
    200.45x = 300.66 × 149.18
  4. Step 4: Simplify right side
    200.45x = 44,850.40
  5. Step 5: Solve for x
    x = 44,850.40/200.45
  6. Step 6: Final answer
    x = 223.75

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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.