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Finding the Fourth Proportional to 220.32, 303.41 and 154.71

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Solution

The fourth proportional to 220.32, 303.41 and 154.71 is: 213.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.32 : 303.41 = 154.71 : x
  2. Step 2: Convert to fraction form
    220.32/303.41 = 154.71/x
  3. Step 3: Cross multiply
    220.32x = 303.41 × 154.71
  4. Step 4: Simplify right side
    220.32x = 46,940.95
  5. Step 5: Solve for x
    x = 46,940.95/220.32
  6. Step 6: Final answer
    x = 213.06

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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.