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Finding the Fourth Proportional to 146.25, 218.83 and 138.04

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Solution

The fourth proportional to 146.25, 218.83 and 138.04 is: 206.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.25 : 218.83 = 138.04 : x
  2. Step 2: Convert to fraction form
    146.25/218.83 = 138.04/x
  3. Step 3: Cross multiply
    146.25x = 218.83 × 138.04
  4. Step 4: Simplify right side
    146.25x = 30,207.29
  5. Step 5: Solve for x
    x = 30,207.29/146.25
  6. Step 6: Final answer
    x = 206.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.