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Finding the Fourth Proportional to 221.04, 304.86 and 174.31

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Solution

The fourth proportional to 221.04, 304.86 and 174.31 is: 240.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.04 : 304.86 = 174.31 : x
  2. Step 2: Convert to fraction form
    221.04/304.86 = 174.31/x
  3. Step 3: Cross multiply
    221.04x = 304.86 × 174.31
  4. Step 4: Simplify right side
    221.04x = 53,141.63
  5. Step 5: Solve for x
    x = 53,141.63/221.04
  6. Step 6: Final answer
    x = 240.42

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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.