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Finding the Fourth Proportional to 219.78, 303.42 and 150.22

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Solution

The fourth proportional to 219.78, 303.42 and 150.22 is: 207.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.78 : 303.42 = 150.22 : x
  2. Step 2: Convert to fraction form
    219.78/303.42 = 150.22/x
  3. Step 3: Cross multiply
    219.78x = 303.42 × 150.22
  4. Step 4: Simplify right side
    219.78x = 45,579.75
  5. Step 5: Solve for x
    x = 45,579.75/219.78
  6. Step 6: Final answer
    x = 207.39

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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.