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Finding the Fourth Proportional to 220.28, 303.95 and 122.00

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Solution

The fourth proportional to 220.28, 303.95 and 122.00 is: 168.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.28 : 303.95 = 122.00 : x
  2. Step 2: Convert to fraction form
    220.28/303.95 = 122.00/x
  3. Step 3: Cross multiply
    220.28x = 303.95 × 122.00
  4. Step 4: Simplify right side
    220.28x = 37,080.69
  5. Step 5: Solve for x
    x = 37,080.69/220.28
  6. Step 6: Final answer
    x = 168.34

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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.