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Finding the Fourth Proportional to 220.10, 303.80 and 154.62

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Solution

The fourth proportional to 220.10, 303.80 and 154.62 is: 213.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.10 : 303.80 = 154.62 : x
  2. Step 2: Convert to fraction form
    220.10/303.80 = 154.62/x
  3. Step 3: Cross multiply
    220.10x = 303.80 × 154.62
  4. Step 4: Simplify right side
    220.10x = 46,972.78
  5. Step 5: Solve for x
    x = 46,972.78/220.10
  6. Step 6: Final answer
    x = 213.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.