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Finding the Fourth Proportional to 57.96, 79.98 and 34.64

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Solution

The fourth proportional to 57.96, 79.98 and 34.64 is: 47.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.96 : 79.98 = 34.64 : x
  2. Step 2: Convert to fraction form
    57.96/79.98 = 34.64/x
  3. Step 3: Cross multiply
    57.96x = 79.98 × 34.64
  4. Step 4: Simplify right side
    57.96x = 2,770.51
  5. Step 5: Solve for x
    x = 2,770.51/57.96
  6. Step 6: Final answer
    x = 47.80

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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.