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Finding the Fourth Proportional to 219.57, 303.05 and 144.75

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Solution

The fourth proportional to 219.57, 303.05 and 144.75 is: 199.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.57 : 303.05 = 144.75 : x
  2. Step 2: Convert to fraction form
    219.57/303.05 = 144.75/x
  3. Step 3: Cross multiply
    219.57x = 303.05 × 144.75
  4. Step 4: Simplify right side
    219.57x = 43,867.58
  5. Step 5: Solve for x
    x = 43,867.58/219.57
  6. Step 6: Final answer
    x = 199.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.