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Finding the Fourth Proportional to 51.58, 77.26 and 28.77

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Solution

The fourth proportional to 51.58, 77.26 and 28.77 is: 43.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.58 : 77.26 = 28.77 : x
  2. Step 2: Convert to fraction form
    51.58/77.26 = 28.77/x
  3. Step 3: Cross multiply
    51.58x = 77.26 × 28.77
  4. Step 4: Simplify right side
    51.58x = 2,222.77
  5. Step 5: Solve for x
    x = 2,222.77/51.58
  6. Step 6: Final answer
    x = 43.09

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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.