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Finding the Fourth Proportional to 50.99, 76.38 and 25.31

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Solution

The fourth proportional to 50.99, 76.38 and 25.31 is: 37.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.99 : 76.38 = 25.31 : x
  2. Step 2: Convert to fraction form
    50.99/76.38 = 25.31/x
  3. Step 3: Cross multiply
    50.99x = 76.38 × 25.31
  4. Step 4: Simplify right side
    50.99x = 1,932.80
  5. Step 5: Solve for x
    x = 1,932.80/50.99
  6. Step 6: Final answer
    x = 37.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.