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Finding the Fourth Proportional to 53.94, 80.84 and 52.64

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Solution

The fourth proportional to 53.94, 80.84 and 52.64 is: 78.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.94 : 80.84 = 52.64 : x
  2. Step 2: Convert to fraction form
    53.94/80.84 = 52.64/x
  3. Step 3: Cross multiply
    53.94x = 80.84 × 52.64
  4. Step 4: Simplify right side
    53.94x = 4,254.75
  5. Step 5: Solve for x
    x = 4,254.75/53.94
  6. Step 6: Final answer
    x = 78.88

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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.