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Finding the Fourth Proportional to 53.79, 80.56 and 28.02

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Solution

The fourth proportional to 53.79, 80.56 and 28.02 is: 41.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.79 : 80.56 = 28.02 : x
  2. Step 2: Convert to fraction form
    53.79/80.56 = 28.02/x
  3. Step 3: Cross multiply
    53.79x = 80.56 × 28.02
  4. Step 4: Simplify right side
    53.79x = 2,257.29
  5. Step 5: Solve for x
    x = 2,257.29/53.79
  6. Step 6: Final answer
    x = 41.96

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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.