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Finding the Fourth Proportional to 57.37, 79.19 and 42.59

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Solution

The fourth proportional to 57.37, 79.19 and 42.59 is: 58.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.37 : 79.19 = 42.59 : x
  2. Step 2: Convert to fraction form
    57.37/79.19 = 42.59/x
  3. Step 3: Cross multiply
    57.37x = 79.19 × 42.59
  4. Step 4: Simplify right side
    57.37x = 3,372.70
  5. Step 5: Solve for x
    x = 3,372.70/57.37
  6. Step 6: Final answer
    x = 58.79

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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.