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Finding the Fourth Proportional to 146.19, 219.29 and 128.27

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Solution

The fourth proportional to 146.19, 219.29 and 128.27 is: 192.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.19 : 219.29 = 128.27 : x
  2. Step 2: Convert to fraction form
    146.19/219.29 = 128.27/x
  3. Step 3: Cross multiply
    146.19x = 219.29 × 128.27
  4. Step 4: Simplify right side
    146.19x = 28,128.33
  5. Step 5: Solve for x
    x = 28,128.33/146.19
  6. Step 6: Final answer
    x = 192.41

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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.