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Finding the Fourth Proportional to 221.36, 305.12 and 174.66

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Solution

The fourth proportional to 221.36, 305.12 and 174.66 is: 240.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.36 : 305.12 = 174.66 : x
  2. Step 2: Convert to fraction form
    221.36/305.12 = 174.66/x
  3. Step 3: Cross multiply
    221.36x = 305.12 × 174.66
  4. Step 4: Simplify right side
    221.36x = 53,292.26
  5. Step 5: Solve for x
    x = 53,292.26/221.36
  6. Step 6: Final answer
    x = 240.75

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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.