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Finding the Fourth Proportional to 305.94, 422.19 and 166.05

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Solution

The fourth proportional to 305.94, 422.19 and 166.05 is: 229.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.94 : 422.19 = 166.05 : x
  2. Step 2: Convert to fraction form
    305.94/422.19 = 166.05/x
  3. Step 3: Cross multiply
    305.94x = 422.19 × 166.05
  4. Step 4: Simplify right side
    305.94x = 70,105.29
  5. Step 5: Solve for x
    x = 70,105.29/305.94
  6. Step 6: Final answer
    x = 229.15

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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.