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Finding the Fourth Proportional to 220.56, 304.41 and 165.21

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Solution

The fourth proportional to 220.56, 304.41 and 165.21 is: 228.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.56 : 304.41 = 165.21 : x
  2. Step 2: Convert to fraction form
    220.56/304.41 = 165.21/x
  3. Step 3: Cross multiply
    220.56x = 304.41 × 165.21
  4. Step 4: Simplify right side
    220.56x = 50,291.58
  5. Step 5: Solve for x
    x = 50,291.58/220.56
  6. Step 6: Final answer
    x = 228.02

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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.