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Finding the Fourth Proportional to 305.91, 422.10 and 174.90

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Solution

The fourth proportional to 305.91, 422.10 and 174.90 is: 241.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.91 : 422.10 = 174.90 : x
  2. Step 2: Convert to fraction form
    305.91/422.10 = 174.90/x
  3. Step 3: Cross multiply
    305.91x = 422.10 × 174.90
  4. Step 4: Simplify right side
    305.91x = 73,825.29
  5. Step 5: Solve for x
    x = 73,825.29/305.91
  6. Step 6: Final answer
    x = 241.33

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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.