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Finding the Fourth Proportional to 51.66, 77.43 and 28.83

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Solution

The fourth proportional to 51.66, 77.43 and 28.83 is: 43.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.66 : 77.43 = 28.83 : x
  2. Step 2: Convert to fraction form
    51.66/77.43 = 28.83/x
  3. Step 3: Cross multiply
    51.66x = 77.43 × 28.83
  4. Step 4: Simplify right side
    51.66x = 2,232.31
  5. Step 5: Solve for x
    x = 2,232.31/51.66
  6. Step 6: Final answer
    x = 43.21

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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.