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Finding the Fourth Proportional to 51.39, 76.79 and 41.64

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Solution

The fourth proportional to 51.39, 76.79 and 41.64 is: 62.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.39 : 76.79 = 41.64 : x
  2. Step 2: Convert to fraction form
    51.39/76.79 = 41.64/x
  3. Step 3: Cross multiply
    51.39x = 76.79 × 41.64
  4. Step 4: Simplify right side
    51.39x = 3,197.54
  5. Step 5: Solve for x
    x = 3,197.54/51.39
  6. Step 6: Final answer
    x = 62.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.