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Finding the Fourth Proportional to 220.75, 304.61 and 122.50

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Solution

The fourth proportional to 220.75, 304.61 and 122.50 is: 169.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.75 : 304.61 = 122.50 : x
  2. Step 2: Convert to fraction form
    220.75/304.61 = 122.50/x
  3. Step 3: Cross multiply
    220.75x = 304.61 × 122.50
  4. Step 4: Simplify right side
    220.75x = 37,313.20
  5. Step 5: Solve for x
    x = 37,313.20/220.75
  6. Step 6: Final answer
    x = 169.03

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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.