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Finding the Fourth Proportional to 53.74, 80.67 and 45.27

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Solution

The fourth proportional to 53.74, 80.67 and 45.27 is: 67.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.74 : 80.67 = 45.27 : x
  2. Step 2: Convert to fraction form
    53.74/80.67 = 45.27/x
  3. Step 3: Cross multiply
    53.74x = 80.67 × 45.27
  4. Step 4: Simplify right side
    53.74x = 3,651.93
  5. Step 5: Solve for x
    x = 3,651.93/53.74
  6. Step 6: Final answer
    x = 67.96

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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.