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Finding the Fourth Proportional to 219.63, 329.07 and 141.55

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Solution

The fourth proportional to 219.63, 329.07 and 141.55 is: 212.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.63 : 329.07 = 141.55 : x
  2. Step 2: Convert to fraction form
    219.63/329.07 = 141.55/x
  3. Step 3: Cross multiply
    219.63x = 329.07 × 141.55
  4. Step 4: Simplify right side
    219.63x = 46,579.86
  5. Step 5: Solve for x
    x = 46,579.86/219.63
  6. Step 6: Final answer
    x = 212.08

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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.