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Finding the Fourth Proportional to 220.63, 304.46 and 143

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Solution

The fourth proportional to 220.63, 304.46 and 143 is: 197.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.63 : 304.46 = 143 : x
  2. Step 2: Convert to fraction form
    220.63/304.46 = 143/x
  3. Step 3: Cross multiply
    220.63x = 304.46 × 143
  4. Step 4: Simplify right side
    220.63x = 43,537.78
  5. Step 5: Solve for x
    x = 43,537.78/220.63
  6. Step 6: Final answer
    x = 197.33

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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.