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Finding the Fourth Proportional to 146.20, 218.15 and 122.20

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Solution

The fourth proportional to 146.20, 218.15 and 122.20 is: 182.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.20 : 218.15 = 122.20 : x
  2. Step 2: Convert to fraction form
    146.20/218.15 = 122.20/x
  3. Step 3: Cross multiply
    146.20x = 218.15 × 122.20
  4. Step 4: Simplify right side
    146.20x = 26,657.93
  5. Step 5: Solve for x
    x = 26,657.93/146.20
  6. Step 6: Final answer
    x = 182.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.