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Finding the Fourth Proportional to 47.89, 65.96 and 34.05

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Solution

The fourth proportional to 47.89, 65.96 and 34.05 is: 46.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.89 : 65.96 = 34.05 : x
  2. Step 2: Convert to fraction form
    47.89/65.96 = 34.05/x
  3. Step 3: Cross multiply
    47.89x = 65.96 × 34.05
  4. Step 4: Simplify right side
    47.89x = 2,245.94
  5. Step 5: Solve for x
    x = 2,245.94/47.89
  6. Step 6: Final answer
    x = 46.90

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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.