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Finding the Fourth Proportional to 146.80, 221.38 and 145.84

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Solution

The fourth proportional to 146.80, 221.38 and 145.84 is: 219.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.80 : 221.38 = 145.84 : x
  2. Step 2: Convert to fraction form
    146.80/221.38 = 145.84/x
  3. Step 3: Cross multiply
    146.80x = 221.38 × 145.84
  4. Step 4: Simplify right side
    146.80x = 32,286.06
  5. Step 5: Solve for x
    x = 32,286.06/146.80
  6. Step 6: Final answer
    x = 219.93

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.