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Finding the Fourth Proportional to 220.49, 304.28 and 122.25

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Solution

The fourth proportional to 220.49, 304.28 and 122.25 is: 168.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.49 : 304.28 = 122.25 : x
  2. Step 2: Convert to fraction form
    220.49/304.28 = 122.25/x
  3. Step 3: Cross multiply
    220.49x = 304.28 × 122.25
  4. Step 4: Simplify right side
    220.49x = 37,196.48
  5. Step 5: Solve for x
    x = 37,196.48/220.49
  6. Step 6: Final answer
    x = 168.70

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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.