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Finding the Fourth Proportional to 220.53, 304.32 and 120.95

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Solution

The fourth proportional to 220.53, 304.32 and 120.95 is: 166.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.53 : 304.32 = 120.95 : x
  2. Step 2: Convert to fraction form
    220.53/304.32 = 120.95/x
  3. Step 3: Cross multiply
    220.53x = 304.32 × 120.95
  4. Step 4: Simplify right side
    220.53x = 36,807.50
  5. Step 5: Solve for x
    x = 36,807.50/220.53
  6. Step 6: Final answer
    x = 166.90

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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.