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Finding the Fourth Proportional to 57.35, 85.82 and 51.22

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Solution

The fourth proportional to 57.35, 85.82 and 51.22 is: 76.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.35 : 85.82 = 51.22 : x
  2. Step 2: Convert to fraction form
    57.35/85.82 = 51.22/x
  3. Step 3: Cross multiply
    57.35x = 85.82 × 51.22
  4. Step 4: Simplify right side
    57.35x = 4,395.02
  5. Step 5: Solve for x
    x = 4,395.02/57.35
  6. Step 6: Final answer
    x = 76.63

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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.