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Finding the Fourth Proportional to 219.60, 329.15 and 146.49

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Solution

The fourth proportional to 219.60, 329.15 and 146.49 is: 219.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.60 : 329.15 = 146.49 : x
  2. Step 2: Convert to fraction form
    219.60/329.15 = 146.49/x
  3. Step 3: Cross multiply
    219.60x = 329.15 × 146.49
  4. Step 4: Simplify right side
    219.60x = 48,216.45
  5. Step 5: Solve for x
    x = 48,216.45/219.60
  6. Step 6: Final answer
    x = 219.56

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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.