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Finding the Fourth Proportional to 47.64, 65.78 and 33.11

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Solution

The fourth proportional to 47.64, 65.78 and 33.11 is: 45.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.64 : 65.78 = 33.11 : x
  2. Step 2: Convert to fraction form
    47.64/65.78 = 33.11/x
  3. Step 3: Cross multiply
    47.64x = 65.78 × 33.11
  4. Step 4: Simplify right side
    47.64x = 2,177.48
  5. Step 5: Solve for x
    x = 2,177.48/47.64
  6. Step 6: Final answer
    x = 45.71

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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.