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Finding the Fourth Proportional to 63.21, 94.75 and 40.39

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Solution

The fourth proportional to 63.21, 94.75 and 40.39 is: 60.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.21 : 94.75 = 40.39 : x
  2. Step 2: Convert to fraction form
    63.21/94.75 = 40.39/x
  3. Step 3: Cross multiply
    63.21x = 94.75 × 40.39
  4. Step 4: Simplify right side
    63.21x = 3,826.95
  5. Step 5: Solve for x
    x = 3,826.95/63.21
  6. Step 6: Final answer
    x = 60.54

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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.