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Finding the Fourth Proportional to 149.78, 224.67 and 52.28

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Solution

The fourth proportional to 149.78, 224.67 and 52.28 is: 78.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.78 : 224.67 = 52.28 : x
  2. Step 2: Convert to fraction form
    149.78/224.67 = 52.28/x
  3. Step 3: Cross multiply
    149.78x = 224.67 × 52.28
  4. Step 4: Simplify right side
    149.78x = 11,745.75
  5. Step 5: Solve for x
    x = 11,745.75/149.78
  6. Step 6: Final answer
    x = 78.42

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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.