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Finding the Fourth Proportional to 220.63, 304.31 and 136.58

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Solution

The fourth proportional to 220.63, 304.31 and 136.58 is: 188.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.63 : 304.31 = 136.58 : x
  2. Step 2: Convert to fraction form
    220.63/304.31 = 136.58/x
  3. Step 3: Cross multiply
    220.63x = 304.31 × 136.58
  4. Step 4: Simplify right side
    220.63x = 41,563.07
  5. Step 5: Solve for x
    x = 41,563.07/220.63
  6. Step 6: Final answer
    x = 188.38

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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.