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Finding the Fourth Proportional to 51.36, 77.00 and 28.52

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Solution

The fourth proportional to 51.36, 77.00 and 28.52 is: 42.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.36 : 77.00 = 28.52 : x
  2. Step 2: Convert to fraction form
    51.36/77.00 = 28.52/x
  3. Step 3: Cross multiply
    51.36x = 77.00 × 28.52
  4. Step 4: Simplify right side
    51.36x = 2,195.51
  5. Step 5: Solve for x
    x = 2,195.51/51.36
  6. Step 6: Final answer
    x = 42.75

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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.