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Finding the Fourth Proportional to 50.85, 69.59 and 50.31

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Solution

The fourth proportional to 50.85, 69.59 and 50.31 is: 68.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.85 : 69.59 = 50.31 : x
  2. Step 2: Convert to fraction form
    50.85/69.59 = 50.31/x
  3. Step 3: Cross multiply
    50.85x = 69.59 × 50.31
  4. Step 4: Simplify right side
    50.85x = 3,501.20
  5. Step 5: Solve for x
    x = 3,501.20/50.85
  6. Step 6: Final answer
    x = 68.85

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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.