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Finding the Fourth Proportional to 305.88, 422.08 and 173.12

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Solution

The fourth proportional to 305.88, 422.08 and 173.12 is: 238.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.88 : 422.08 = 173.12 : x
  2. Step 2: Convert to fraction form
    305.88/422.08 = 173.12/x
  3. Step 3: Cross multiply
    305.88x = 422.08 × 173.12
  4. Step 4: Simplify right side
    305.88x = 73,070.49
  5. Step 5: Solve for x
    x = 73,070.49/305.88
  6. Step 6: Final answer
    x = 238.89

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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.