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Finding the Fourth Proportional to 47.28, 64.90 and 41.73

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Solution

The fourth proportional to 47.28, 64.90 and 41.73 is: 57.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.28 : 64.90 = 41.73 : x
  2. Step 2: Convert to fraction form
    47.28/64.90 = 41.73/x
  3. Step 3: Cross multiply
    47.28x = 64.90 × 41.73
  4. Step 4: Simplify right side
    47.28x = 2,708.17
  5. Step 5: Solve for x
    x = 2,708.17/47.28
  6. Step 6: Final answer
    x = 57.28

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.