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Finding the Fourth Proportional to 41.94, 63.21 and 39

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Solution

The fourth proportional to 41.94, 63.21 and 39 is: 58.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.94 : 63.21 = 39 : x
  2. Step 2: Convert to fraction form
    41.94/63.21 = 39/x
  3. Step 3: Cross multiply
    41.94x = 63.21 × 39
  4. Step 4: Simplify right side
    41.94x = 2,465.19
  5. Step 5: Solve for x
    x = 2,465.19/41.94
  6. Step 6: Final answer
    x = 58.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.