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Finding the Fourth Proportional to 57.36, 79.02 and 53.88

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Solution

The fourth proportional to 57.36, 79.02 and 53.88 is: 74.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.36 : 79.02 = 53.88 : x
  2. Step 2: Convert to fraction form
    57.36/79.02 = 53.88/x
  3. Step 3: Cross multiply
    57.36x = 79.02 × 53.88
  4. Step 4: Simplify right side
    57.36x = 4,257.60
  5. Step 5: Solve for x
    x = 4,257.60/57.36
  6. Step 6: Final answer
    x = 74.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.