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Finding the Fourth Proportional to 57.24, 85.41 and 51.80

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Solution

The fourth proportional to 57.24, 85.41 and 51.80 is: 77.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.24 : 85.41 = 51.80 : x
  2. Step 2: Convert to fraction form
    57.24/85.41 = 51.80/x
  3. Step 3: Cross multiply
    57.24x = 85.41 × 51.80
  4. Step 4: Simplify right side
    57.24x = 4,423.81
  5. Step 5: Solve for x
    x = 4,423.81/57.24
  6. Step 6: Final answer
    x = 77.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.