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Finding the Fourth Proportional to 51.27, 70.44 and 49.91

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Solution

The fourth proportional to 51.27, 70.44 and 49.91 is: 68.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.27 : 70.44 = 49.91 : x
  2. Step 2: Convert to fraction form
    51.27/70.44 = 49.91/x
  3. Step 3: Cross multiply
    51.27x = 70.44 × 49.91
  4. Step 4: Simplify right side
    51.27x = 3,515.31
  5. Step 5: Solve for x
    x = 3,515.31/51.27
  6. Step 6: Final answer
    x = 68.56

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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.